{"id":28011,"date":"2026-07-10T15:18:25","date_gmt":"2026-07-10T07:18:25","guid":{"rendered":"https:\/\/wanzhisteels.com\/?p=28011"},"modified":"2026-10-16T11:20:43","modified_gmt":"2026-10-16T03:20:43","slug":"stainless-steel-for-food-processing-ss-304-316-supplier","status":"publish","type":"post","link":"https:\/\/wanzhisteels.com\/uk\/stainless-steel-for-food-processing-ss-304-316-supplier\/","title":{"rendered":"Stainless Steel for Food Processing | SS 304\/316 Supplier"},"content":{"rendered":"\n<div class=\"wp-block-uagb-container uagb-block-c3c03179 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-advanced-heading uagb-block-69d5b2d5\"><h1 class=\"uagb-heading-text\">Your AttractiveStainless Steel for Food Processing | SS 304\/316 Supplier Heading<\/h1><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-c5508675 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-container uagb-block-866a6234 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-1 wp-block-paragraph\">The food processing industry needs materials that stay hygienic, resist corrosion, hold up under daily use, and clean without trouble. Stainless steel has become the standard material for food processing equipment for good reason. From preparation and storage to transport and packaging, stainless steel for food processing earns its place through solid mechanical properties and a surface that is easy to keep sanitary. As a certified food-grade stainless steel manufacturer in China, Wanzhi Steel supplies <a href=\"https:\/\/wanzhisteels.com\/304-stainless-steel-sheet\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline;\">304\/304L<\/span><\/a>, <a href=\"https:\/\/wanzhisteels.com\/316-stainless-steel-sheet\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline;\">316\/316L<\/span><\/a> and <a href=\"https:\/\/wanzhisteels.com\/430-stainless-steel-sheet\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline;\">430 stainless steel sheet<\/span><\/a>, plus coil, pipe, and bar that meet FDA, NSF\/ANSI 51, and 3-A Sanitary Standards, with surface finishes reaching Ra 0.8 um or better for food-contact use.<\/p>\n\n\n\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-2 wp-block-paragraph\">Whether manufacturing dairy products, beverages, meat, seafood, baked goods, or pharmaceutical-grade food ingredients, selecting the right food-grade stainless steel is essential for ensuring product safety, extending equipment life, and complying with international food safety regulations. <a href=\"#ds-open-popup-1\" title=\"Request a quote today for factory-direct pricing.\"><span style=\"text-decoration: underline;\">Request a quote today for factory-direct pricing.<\/span><\/a><\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-cd33d476\"><h2 class=\"uagb-heading-text\">What will this article teach you<\/h2><\/div>\n\n\n\n<ol class=\"wp-block-list\">\n<li class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-3\"><strong><a href=\"#why-standard\" title=\"Stainless Steel for Food Processing: Why It Is the Industry Standard?\">Stainless Steel for Food Processing: Why It Is the Industry Standard?<\/a><\/strong><\/li>\n\n\n\n<li class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-4\"><strong><a href=\"#what-is-food-grade\" title=\"What Is Food Grade Stainless Steel?\">What Is Food Grade Stainless Steel?<\/a><\/strong><\/li>\n\n\n\n<li class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-5\"><strong><a href=\"#grades-compare\" title=\"Food-Grade Stainless Steel Grades: 304 vs 316 vs 430\">Food-Grade Stainless Steel Grades: 304 vs 316 vs 430<\/a><\/strong><\/li>\n\n\n\n<li class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-6\"><strong><a href=\"#applications\" title=\"Common Applications of Stainless Steel in Food Processing\">Common Applications of Stainless Steel in Food Processing<\/a><\/strong><\/li>\n\n\n\n<li class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-7\"><strong><a href=\"#surface\" title=\"Surface smoothness requirements for food contact materials\">Surface smoothness requirements for food contact materials<\/a><\/strong><\/li>\n\n\n\n<li class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-8\"><strong><a href=\"#standards\" title=\"International Standards for Food Processing Stainless Steel\">International Standards for Food Processing Stainless Steel<\/a><\/strong><\/li>\n\n\n\n<li class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-9\"><strong><a href=\"#products\" title=\"Wanzhi Steel Food-Grade Stainless Steel Products\">Wanzhi Steel Food-Grade Stainless Steel Products<\/a><\/strong><\/li>\n\n\n\n<li class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-10\"><strong><a href=\"#choose\" title=\"How to Choose the Right Stainless Steel for Food Processing?\">How to Choose the Right Stainless Steel for Food Processing?<\/a><\/strong><\/li>\n\n\n\n<li class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-11\"><strong><a href=\"#why-wanzhi\" title=\"Why Choose Wanzhi Steel for Food-Grade Stainless Steel?\">Why Choose Wanzhi Steel for Food-Grade Stainless Steel?<\/a><\/strong><\/li>\n\n\n\n<li class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-12\"><strong><a href=\"#title-10\" title=\"\">FAQ<\/a><\/strong><\/li>\n<\/ol>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-23350059\" id=\"why-standard\"><h2 class=\"uagb-heading-text\">Stainless Steel for Food Processing: Why It Is the Industry Standard?<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Food safety authorities require contact surfaces that are safe, non-absorbent, durable, corrosion-resistant, and smooth. Processing equipment faces water, acid, salt, cleaning chemicals, and temperature swings every single day. Stainless steel meets those requirements and keeps performing for years without putting anything unwanted into the food.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The main reasons plants specify it:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Strong corrosion resistance in wet and acidic service<\/li>\n\n\n\n<li>Non-porous, hygienic surface that blocks bacterial hideouts<\/li>\n\n\n\n<li>Simple to clean and disinfect between runs<\/li>\n\n\n\n<li>High mechanical strength with heat and cold tolerance<\/li>\n\n\n\n<li>Long service life that lowers lifetime cost<\/li>\n\n\n\n<li>Fully recyclable, which fits most plant sustainability goals<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Those traits are why stainless steel sits at the center of modern food manufacturing. Our machinery division builds on the same logic: <a href=\"https:\/\/wz-mach.com\/stainless-steel-tank\/\">Wanzhi Machinery makes stainless steel tanks<\/a> with hygienic interiors for dairy, beverage, and brewing lines.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bottom line<\/strong>: Stainless steel doesn\u2019t just perform\u2014it protects product integrity and consumer safety.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-5d00137a\" id=\"what-is-food-grade\"><h2 class=\"uagb-heading-text\">What Is Food Grade Stainless Steel?<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Not every stainless grade belongs in contact with food. Of the roughly 150 stainless grades in commercial use, only a few are accepted across the food industry. A food-grade stainless steel has to clear four checks:<\/p>\n\n\n\n<ol class=\"wp-block-list has-ast-global-color-2-color has-text-color has-link-color wp-elements-13\">\n<li><strong>Enough chromium (16 percent or more).<\/strong> Chromium forms the invisible passive layer that protects the steel from corrosion. Grades below 16 percent chromium, such as 201 which swaps in manganese for nickel, corrode fast in food service and are not food grade.<\/li>\n\n\n\n<li><strong>Resistance to food acids and cleaning chemicals.<\/strong> Organic acids (citric, acetic, lactic), salt brines, and CIP chemicals like caustic soda, nitric acid, and chlorinated sanitizers all attack the surface. The alloy must take them without pitting, crevice corrosion, or surface breakdown.<\/li>\n\n\n\n<li><strong>Hygienic surface finish (Ra 0.8 um or better).<\/strong> Contact surfaces have to be smooth enough to stop bacteria from lodging and to clean fully. Both the US <a href=\"https:\/\/www.3-a.org\/\" target=\"_blank\" rel=\"noopener nofollow\">3-A Sanitary Standards<\/a> and the European <a href=\"https:\/\/www.ehedg.org\/\" target=\"_blank\" rel=\"noopener nofollow\">EHEDG<\/a> set the food-contact limit at Ra 0.8 um (32 uin). Rougher faces trap particles and bacteria that cleaning cannot reach.<\/li>\n\n\n\n<li><strong>Traceability and certification.<\/strong> Food-grade material ships with a Mill Test Certificate (MTC) showing chemistry, heat number, and compliance statements.<\/li>\n<\/ol>\n\n\n\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-14 wp-block-paragraph\">The grades you will see most often are <a href=\"https:\/\/wanzhisteels.com\/304-stainless-steel-sheet\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline;\">304\/304L<\/span><\/a> and <a href=\"https:\/\/wanzhisteels.com\/316-stainless-steel-sheet\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline;\">316\/316L<\/span><\/a>. 304 is the default for most lines because it balances performance and cost. 316 is the call when the surface meets chlorides, acidic foods, or frequent chemical cleaning. The <a href=\"https:\/\/www.bssa.org.uk\/bssa_articles\/selection-of-stainless-steels-for-the-food-processing-industries\/\" target=\"_blank\" rel=\"noopener nofollow\">British Stainless Steel Association<\/a> covers grade selection in detail for plant engineers.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-de377617\" id=\"grades-compare\"><h2 class=\"uagb-heading-text\">Food-Grade Stainless Steel Grades: 304 vs 316 vs 430<\/h2><\/div>\n\n\n\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-15 wp-block-paragraph\">The three common food-grade families are the 300-series austenitic grades (304, 316) and the 400-series ferritic grade (430). Here is how they line up.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-76284c97\"><h3 class=\"uagb-heading-text\">Grade 304 Stainless Steel<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The Industry Workhorse<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">304 is specified for more than half of all foodservice products. Its 18% chromium \/ 8% nickel composition provides excellent corrosion resistance against food acids and cleaning solutions at a reasonable cost.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Conveyor systems, water supply and non-acidic beverages (water, tea, coffee)<\/li>\n\n\n\n<li>Dairy processing (milk, yogurt)<\/li>\n\n\n\n<li>Bakery and confectionery equipment<\/li>\n\n\n\n<li>Cookware, utensils, and food storage<\/li>\n\n\n\n<li>Beverage production equipment<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Limitation<\/strong>: 304 is susceptible to pitting corrosion in chloride-rich conditions (salty\/briny environments). It shows accelerated uniform corrosion in prolonged or repeated contact with acidic materials, especially at elevated temperatures.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-365eb3a6\" id=\"SS-title-05\"><h3 class=\"uagb-heading-text\">Grade 316 Stainless Steel<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The Premium Choice for Demanding Environments<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The addition of 2\u20133% molybdenum gives 316 superior resistance to pitting and crevice corrosion\u2014particularly in chloride-exposed, acidic, or high-temperature environments. This makes 316 the go-to grade for the most aggressive food processing applications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pharmaceutical manufacturing<\/li>\n\n\n\n<li>High-acid or Salt-rich food production<\/li>\n\n\n\n<li>Seafood processing and brining operations<\/li>\n\n\n\n<li>Acidic food products (citrus, tomatoes)<\/li>\n\n\n\n<li>Breweries and dairy plants with aggressive CIP regimens<\/li>\n\n\n\n<li>Facilities using harsh chemical washdowns<\/li>\n\n\n\n<li>Coastal manufacturing facilities with high ambient chloride levels<\/li>\n<\/ul>\n\n\n\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-16 wp-block-paragraph\"><strong><a href=\"https:\/\/wanzhisteels.com\/316-stainless-steel-sheet\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline;\">316L<\/span><\/a> <\/strong>(carbon at or below 0.03 percent) is often the better pick for welded parts because it avoids intergranular corrosion at the seam. For pipe runs that see chlorides, our <a href=\"https:\/\/wanzhisteels.com\/astm-a312-316l-stainless-steel-pipe\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline;\">316L pipe built to ASTM A312<\/span><\/a> is a common spec.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-36d199a9\"><h3 class=\"uagb-heading-text\">Grade 430 Stainless Steel<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The Budget Alternative for Non-Critical Applications<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">430 is ferritic with low nickel, so it costs less than 304 or 316. The <a href=\"https:\/\/www.bssa.org.uk\/bssa_articles\/selection-of-stainless-steels-for-the-food-processing-industries\/\" target=\"_blank\" rel=\"noopener nofollow\">British Stainless Steel Association<\/a> notes 430 fits splashbacks, housings, and equipment enclosures where corrosion demands are modest.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Splashbacks, housings, and equipment enclosures<a href=\"https:\/\/bssa.org.uk\/bssa_articles\/selection-of-stainless-steels-for-the-food-processing-industries\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li>Refrigerator liners and dry food storage containers<a href=\"https:\/\/www.stainless-steels.com\/info\/food-processing-stainless-steel-304-vs-316-v-102974035.html\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li>Lower-cost applications with moderate corrosion requirements<a href=\"https:\/\/www.teda-metal.com\/is-all-stainless-steel-food-grade\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Limitation:<\/strong>&nbsp;430 is&nbsp;<strong>not recommended for wet or acidic food processing<\/strong>\u2014it may discolor or rust when exposed to moisture and food acids over time<a href=\"https:\/\/www.stainless-steels.com\/info\/food-processing-stainless-steel-304-vs-316-v-102974035.html\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>. It\u2019s also magnetic (ferritic structure), unlike 300-series austenitic grades.<\/p>\n\n\n\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-17 wp-block-paragraph\">A quick read on the three: 316 resists the most, 304 sits in the middle, and 430 covers dry and low-risk contact. If you run a brewery or fermentation line, our <a href=\"https:\/\/wz-mach.com\/blog\/304-vs-316-stainless-steel-brewery-tanks\/\" target=\"_blank\" rel=\"noopener\">304 vs 316 brewery tank guide<\/a> walks through when the molybdenum in 316L earns its price.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-b219c6c2\" id=\"applications\"><h2 class=\"uagb-heading-text\">Common Applications of Stainless Steel for Food Processing<\/h2><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Conveying systems<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Conveyor belts<\/li>\n\n\n\n<li>Rollers<\/li>\n\n\n\n<li>Transfer chutes<\/li>\n\n\n\n<li>Screw conveyors<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Storage and mixing<\/h3>\n\n\n\n<ul class=\"wp-block-list has-ast-global-color-2-color has-text-color has-link-color wp-elements-18\">\n<li>Storage silos and tanks<\/li>\n\n\n\n<li>Mixing and agitating vessels<\/li>\n\n\n\n<li>Hoppers and bins<\/li>\n\n\n\n<li><a href=\"https:\/\/wz-mach.com\/stainless-steel-fermentation-tanks\/\" target=\"_blank\" rel=\"noopener\">Fermentation tanks<\/a> for beer, wine, dairy, and soy<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Piping and transfer<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Process piping and tubing<\/li>\n\n\n\n<li>Pump bodies and valve parts<\/li>\n\n\n\n<li>Fittings and manifolds (see our <a href=\"https:\/\/wanzhisteels.com\/stainless-steel-pipe\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline;\">stainless steel pipe range<\/span><\/a>)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Preparation surfaces<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Countertops and prep tables<\/li>\n\n\n\n<li>Cutting and deboning stations<\/li>\n\n\n\n<li>Sinks and wash stations<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Thermal and cleaning equipment<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pasteurizers and sterilizers<\/li>\n\n\n\n<li>Heat exchangers<\/li>\n\n\n\n<li>CIP cleaning systems<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:15%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:70%\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image aligncenter uagb-block-7f806671 wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-center\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/304-stainless-steel-basin.jpg\" alt=\"304 stainless steel basin, stainless steel for food processing\" class=\"uag-image-28044\" width=\"460\" height=\"460\" title=\"304 stainless steel basin\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image aligncenter uagb-block-a42c555f wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-center\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/304L316L-stainless-steel-mixer-sandwich-pot-stir-fry-machine.jpg\" alt=\"304L 316L stainless steel mixer, sandwich pot, stir fry machine\" class=\"uag-image-28045\" width=\"460\" height=\"460\" title=\"304L 316L stainless steel mixer, sandwich pot, stir fry machine\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image aligncenter uagb-block-432b008e wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-center\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/Stainless-steel-storage-tank-304316L-vertical-storage-tank.jpg\" alt=\"Stainless steel storage tank 304316L vertical storage tank\" class=\"uag-image-28046\" width=\"460\" height=\"460\" title=\"Stainless steel storage tank 304316L vertical storage tank\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:15%\"><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:15%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:70%\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image aligncenter uagb-block-e81ab97d wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-center\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/304-stainless-steel-noodle-machine.jpg\" alt=\"304 stainless steel noodle machine\" class=\"uag-image-28052\" width=\"460\" height=\"460\" title=\"304 stainless steel noodle machine\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image aligncenter uagb-block-8de77885 wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-center\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/Food-mixer-304-stainless-steel-filling-machine.jpg\" alt=\"Stainless Steel for Food Processing, Food mixer 304 stainless steel filling machine\" class=\"uag-image-28051\" width=\"460\" height=\"460\" title=\"Food mixer 304 stainless steel filling machine\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image aligncenter uagb-block-3c805d84 wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-center\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/Laboratory-stainless-steel-essential-oil-extraction-equipment.jpg\" alt=\"stainless steel for food processing, Laboratory stainless steel essential oil extraction equipment\" class=\"uag-image-28050\" width=\"460\" height=\"460\" title=\"Laboratory stainless steel essential oil extraction equipment\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:15%\"><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-1677be91\" id=\"surface\"><h2 class=\"uagb-heading-text\">Surface smoothness requirements for food contact materials<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Picking a grade does not by itself make steel food-safe. The <strong>surface finish<\/strong> matters just as much because it decides whether bacteria can hide in tiny surface irregularities and whether the surface cleans fully.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-7936da67\"><h3 class=\"uagb-heading-text\">The Ra \u2264 0.8 \u03bcm Rule<\/h3><\/div>\n\n\n\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-19 wp-block-paragraph\">Both the\u00a0<a href=\"https:\/\/www.3-a.org\/\" target=\"_blank\" rel=\"noopener nofollow\">3-A Sanitary Standards<\/a>\u00a0(US) and\u00a0<a href=\"https:\/\/www.ehedg.org\/\" target=\"_blank\" rel=\"noopener nofollow\">EHEDG<\/a>\u00a0(Europe) specify that food-contact surfaces must have a maximum roughness of\u00a0<strong>Ra = 0.8 \u03bcm (32 \u03bcin)<\/strong>. Below this threshold, the surface is too smooth for bacteria to lodge in and survive routine cleaning. Above it, microscopic peaks and valleys trap food particles and bacterial colonies that CIP procedures cannot fully remove. Our <a href=\"https:\/\/wanzhisteels.com\/stainless-steel-surface-finish-guide\/\" target=\"_blank\" rel=\"noopener\">surface finish guide<\/a> explains how 2B, No. 4, and BA are made and where each fits.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">FinishTypical RaFood contact?UseMill finish (No.1)Above 2.5 umNoStructural, non-contact2B (cold rolled)0.4 to 1.0 umCheckBorderline, test before food useNo. 4 brushed0.5 to 0.8 umYesCommon food finishNo. 4 fineAt or below 0.8 umYes3-A compliant tanks, vesselsElectropolished0.1 to 0.4 umYesPremium, dairy, pharmaMirror (No. 8)0.05 to 0.2 umYesClean-room, decorative<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Surface Finish<\/th><th>Typical Ra<\/th><th>Food Contact?<\/th><th>Application<\/th><\/tr><\/thead><tbody><tr><td>Mill finish (No.1)<\/td><td>&gt; 2.5 \u03bcm (&gt; 100 \u03bcin)<\/td><td>\u274c No<\/td><td>Structural, non-contact<\/td><\/tr><tr><td>2B (cold rolled)<\/td><td>0.4 \u2013 1.0 \u03bcm (15-40 \u03bcin)<\/td><td>\u26a0\ufe0f Verify Ra<\/td><td>Borderline \u2014 test before food contact use<\/td><\/tr><tr><td>No. 4 Brushed<\/td><td>0.5 \u2013 0.8 \u03bcm (20-32 \u03bcin)<\/td><td>\u2705 Common food finish<\/td><td>Countertops, equipment exteriors, tables<\/td><\/tr><tr><td>No. 4 Fine<\/td><td>\u2264 0.8 \u03bcm (\u2264 32 \u03bcin)<\/td><td>\u2705 3-A compliant<\/td><td>Product-contact surfaces, tanks, vessels<\/td><\/tr><tr><td>Electropolished<\/td><td>0.1 \u2013 0.4 \u03bcm (4-16 \u03bcin)<\/td><td>\u2705 Premium<\/td><td>Pharmaceutical, high-purity, dairy<\/td><\/tr><tr><td>Mirror (No. 8)<\/td><td>0.05 \u2013 0.2 \u03bcm<\/td><td>\u2705 Ultra-smooth<\/td><td>Decorative, clean-room panels<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Important:<\/strong> Cold-rolled 2B sheet typically arrives at Ra 0.2-0.5 \u03bcm, which meets the 0.8 \u03bcm requirement. However, <strong>welds, cut edges, and formed areas<\/strong> are much rougher and require post-fabrication grinding and polishing to bring them under the limit. Always specify passivation (<a href=\"https:\/\/en.wikipedia.org\/wiki\/Passivation_(chemistry)\" target=\"_blank\" rel=\"noopener nofollow\">ASTM A380\/A967<\/a>) after welding to restore the chromium oxide passive layer.<\/p>\n<\/blockquote>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-9a2bc4c0\" id=\"standards\"><h2 class=\"uagb-heading-text\">International Standards of Stainless Steel for Food Processing<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Food processing equipment is commonly manufactured in accordance with recognized international standards, including:<\/p>\n\n\n\n<ul class=\"wp-block-list has-ast-global-color-2-color has-text-color has-link-color wp-elements-20\">\n<li><strong><a href=\"https:\/\/store.astm.org\/a0240_a0240m-25.html\" target=\"_blank\" rel=\"noopener nofollow\">ASTM A240<\/a><\/strong> \u2013 Stainless Steel Plate, Sheet, and Strip<\/li>\n\n\n\n<li><strong>ASTM A276<\/strong> \u2013 Stainless Steel Bars and Shapes<\/li>\n\n\n\n<li><strong>EN 10088<\/strong> \u2013 Stainless Steels<\/li>\n\n\n\n<li><strong>ISO 8442<\/strong> \u2013 Materials for food contact equipment<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.nsf.org\/nsf-standards\" target=\"_blank\" rel=\"noopener nofollow\">NSF\/ANSI 51<\/a><\/strong> \u2013 Food Equipment Materials<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.ehedg.org\/\" target=\"_blank\" rel=\"noopener nofollow\">EHEDG Hygienic Design Guidelines<\/a><\/strong> \u2013 Hygienic equipment design for food processing<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.3-a.org\/\" target=\"_blank\" rel=\"noopener nofollow\">3-A Sanitary Standards<\/a><\/strong> \u2013 Hygienic equipment standards widely used in the dairy and food industries<\/li>\n<\/ul>\n\n\n\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-21 wp-block-paragraph\">The <a href=\"https:\/\/www.accessdata.fda.gov\/scripts\/cdrh\/cfdocs\/cfcfr\/CFRSearch.cfm?fr=175.300\" target=\"_blank\" rel=\"noopener nofollow\">US FDA recognizes stainless with 16 percent or more chromium as GRAS for food contact under 21 CFR 175.300<\/a>. Suitability still depends on grade, finish, use, and cleaning. For certified equipment, NSF\/ANSI 51 and 3-A compliance are usually required on top of that. Our <a href=\"https:\/\/wanzhisteels.com\/astm-a240-certified-stainless-steel-sheet\/\" target=\"_blank\" rel=\"noopener\">ASTM A240 certified stainless steel sheet<\/a> ships with MTC and third-party inspection on request.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-a01f7de6\" id=\"products\"><h2 class=\"uagb-heading-text\">Wanzhi Steel Food-Grade Stainless Steel Products<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">We supply food-grade material across forms and grades, all built to order.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-3ad5232a\"><h3 class=\"uagb-heading-text\">Food-Grade Stainless Steel Sheet &amp; Plate<\/h3><\/div>\n\n\n\n<ul class=\"wp-block-list has-ast-global-color-2-color has-text-color has-link-color wp-elements-22\">\n<li><strong>Grades:<\/strong> 304, 304L, 316, 316L<\/li>\n\n\n\n<li><strong>Thickness:<\/strong> Cold rolled 0.2mm \u2013 4.0mm | Hot rolled 4.5mm \u2013 100mm<\/li>\n\n\n\n<li><strong>Width:<\/strong> 600mm \u2013 1,500mm<\/li>\n\n\n\n<li><strong>Surface:<\/strong> 2B, BA, No. 4 (brushed), No. 8 (mirror), HL (hairline)<\/li>\n\n\n\n<li><strong>Standard:<\/strong> ASTM A240 \/ ASME SA240, JIS, EN 10088<\/li>\n\n\n\n<li><strong>Forms:<\/strong> <a href=\"https:\/\/wanzhisteels.com\/cold-rolled-stainless-steel-sheet\/\" target=\"_blank\" rel=\"noopener\">cold-rolled sheet<\/a>, <a href=\"https:\/\/wanzhisteels.com\/brushed-stainless-steel-sheet\/\" target=\"_blank\" rel=\"noopener\">brushed No. 4 sheet<\/a>, plate<\/li>\n\n\n\n<li><strong>Food-Contact Use:<\/strong> Tank walls, countertops, hopper liners, equipment enclosures, food prep surfaces<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image uagb-block-c6e94777 wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-none\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/Wanzhi-steel-304-316-stainless-steel-plate.jpg\" alt=\"Wanzhi steel 304 316 stainless steel plate , stainless steel for food processing\" class=\"uag-image-28035\" width=\"480\" height=\"360\" title=\"Wanzhi steel 304 316 stainless steel plate\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-6f1f74f4\"><h3 class=\"uagb-heading-text\">Stainless Steel Sheet<\/h3><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image uagb-block-88d98c0a wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-none\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/Wanzhi-steel-mirror-surface-stainless-steel-plate.jpg\" alt=\"Wanzhi steel mirror surface stainless steel plate\" class=\"uag-image-28036\" width=\"480\" height=\"360\" title=\"Wanzhi steel mirror surface stainless steel plate\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-10190ccd\"><h3 class=\"uagb-heading-text\">mirror surface ss plate<\/h3><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\"><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-d50b45a2\"><h3 class=\"uagb-heading-text\">Food-Grade Stainless Steel Coil &amp; Strip<\/h3><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Grades:<\/strong> 304, 304L, 316, 316L<\/li>\n\n\n\n<li><strong>Thickness:<\/strong> 0.05mm \u2013 4.0mm<\/li>\n\n\n\n<li><strong>Width:<\/strong> 300mm \u2013 1,240mm (narrow strip available)<\/li>\n\n\n\n<li><strong>Surface:<\/strong> 2B, BA, HL<\/li>\n\n\n\n<li><strong>Food-Contact Use:<\/strong> Roll-formed profiles, stamping blanks, conveyor belts, food packaging components<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image uagb-block-5d78211d wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-none\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/wanzhi-316-stainless-steel-coils.jpg\" alt=\"wanzhi 316 stainless steel coils\" class=\"uag-image-28032\" width=\"480\" height=\"360\" title=\"wanzhi 316 stainless steel coils\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-e809cda5\"><h3 class=\"uagb-heading-text\">316 Stainless Steel Coil<\/h3><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image uagb-block-5dda660a wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-none\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/wanzhi-304-stainless-steel-strips.jpg\" alt=\"wanzhi 304 stainless steel strips\" class=\"uag-image-28033\" width=\"480\" height=\"360\" title=\"wanzhi 304 stainless steel strips\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-e6070a3c\"><h3 class=\"uagb-heading-text\">304 Stainless Steel Strip<\/h3><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\"><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-dbbc4c98\"><h3 class=\"uagb-heading-text\">Food-Grade Stainless Steel Pipe &amp; Tube<\/h3><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Grades:<\/strong>&nbsp;304L, 316L (L-grades standard for welded sanitary piping)<\/li>\n\n\n\n<li><strong>Type:<\/strong>&nbsp;Seamless &amp; welded (ERW, EFW)<\/li>\n\n\n\n<li><strong>OD:<\/strong>&nbsp;6mm \u2013 630mm<\/li>\n\n\n\n<li><strong>Wall:<\/strong>&nbsp;0.5mm \u2013 20mm<\/li>\n\n\n\n<li><strong>Standard:<\/strong>&nbsp;ASTM A312, A269, A270 (sanitary), A249<\/li>\n\n\n\n<li><strong>Surface:<\/strong>&nbsp;Pickled, polished, electropolished for sanitary applications<\/li>\n\n\n\n<li><strong>Food-Contact Use:<\/strong>&nbsp;Sanitary process piping, CIP lines, transfer lines, brewery &amp; dairy piping<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image uagb-block-30f53570 wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-none\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/316L-stainless-steel-seamless-pipe-food-grade-steel-pipe.jpg\" alt=\"316L stainless steel seamless pipe, Stainless Steel for Food Processing\" class=\"uag-image-28038\" width=\"480\" height=\"360\" title=\"316L stainless steel seamless pipe, food grade steel pipe\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-4a445a88\"><h3 class=\"uagb-heading-text\">Stainless Steel Pipe<\/h3><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image uagb-block-71ae0949 wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-none\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/Food-grade-stainless-steel-square-tube.jpg\" alt=\"Food grade stainless steel square tube\" class=\"uag-image-28039\" width=\"480\" height=\"360\" title=\"Food grade stainless steel square tube\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-152246d3\"><h3 class=\"uagb-heading-text\">ss Square Tube<\/h3><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\"><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-aab49643\"><h3 class=\"uagb-heading-text\">Food-Grade Stainless Steel Bar &amp; Rod<\/h3><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Grades:<\/strong>&nbsp;304, 304L, 316, 316L<\/li>\n\n\n\n<li><strong>Type:<\/strong>&nbsp;Round, square, hexagonal, flat<\/li>\n\n\n\n<li><strong>Diameter:<\/strong>&nbsp;3mm \u2013 300mm<\/li>\n\n\n\n<li><strong>Standard:<\/strong>&nbsp;ASTM A276, A479<\/li>\n\n\n\n<li><strong>Surface:<\/strong>&nbsp;Cold drawn, peeled, ground (for precision), polished<\/li>\n\n\n\n<li><strong>Food-Contact Use:<\/strong>&nbsp;Shafting for mixers\/agitators, pump components, valve stems, machine frame parts<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image uagb-block-4caae318 wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-none\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/Food-grade-stainless-steel-round-rod.jpg\" alt=\"Food grade stainless steel round rod\" class=\"uag-image-28041\" width=\"480\" height=\"360\" title=\"Food grade stainless steel round rod\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-1550466e\"><h3 class=\"uagb-heading-text\">Stainless Steel Rod<\/h3><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image uagb-block-e4b894fe wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-none\"><figure class=\"wp-block-uagb-image__figure\"><img decoding=\"async\" src=\"https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/Stainless-steel-bar-316L-square-rod-304-stainless-steel-square-steel-cold-drawn-bright-solid-square-steel-rod.jpg\" alt=\"Stainless steel bar 316L square rod 304 stainless steel square steel cold drawn bright solid square steel rod\" class=\"uag-image-28042\" width=\"480\" height=\"360\" title=\"Stainless steel bar 316L square rod 304 stainless steel square steel cold drawn bright solid square steel rod\" loading=\"lazy\" role=\"img\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-3167a9ae\"><h3 class=\"uagb-heading-text\">SS304 Bar<\/h3><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\"><\/div>\n<\/div>\n\n\n\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-23 wp-block-paragraph\">Browse the full <a href=\"https:\/\/wanzhisteels.com\/all-products\/\" target=\"_blank\" rel=\"noopener\">food-grade product list<\/a> or the <a href=\"https:\/\/wanzhisteels.com\/stainless-steel\/\" target=\"_blank\" rel=\"noopener\">stainless steel overview<\/a> for the complete range.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-36b14594\" id=\"choose\"><h2 class=\"uagb-heading-text\">How to Choose the Right Stainless Steel for Food Processing<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">When selecting food-grade stainless steel for your project, evaluate the full operating environment rather than the alloy composition alone. Consider these six factors:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Corrosion Environment<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">What foods will contact the surface? Salt, acid, and chloride content are the primary corrosion drivers. High-salt foods (cured meats, seafood, sauces) and acidic foods (citrus, vinegar, tomato) require 316\/316L. Neutral or dry foods (bread, pasta, cereals) can use 304.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Cleaning &amp; Sanitation Protocol<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">How frequently is the equipment cleaned, and with what chemicals? Chlorinated sanitizers, caustic CIP solutions, and acidic descalers all increase corrosion risk. If your facility uses chlorine-based cleaning at elevated temperatures, 316L is strongly recommended regardless of the food product.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Welding Requirements<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Will the material be welded? If yes, always specify L-grades (304L or 316L) to prevent sensitization and intergranular corrosion in the heat-affected zone. For sanitary piping, specify orbital welding with full penetration and borescope inspection.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Surface Finish Specification<\/h3>\n\n\n\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-24 wp-block-paragraph\">Never just specify \u201cNo. 4 finish\u201d \u2014 specify\u00a0<strong>Ra \u2264 0.8 \u03bcm<\/strong>\u00a0for product-contact surfaces, along with maximum Rz value, lay direction, and passivation requirement (ASTM A380\/A967). Our <a href=\"https:\/\/wanzhisteels.com\/stainless-steel-surface-finish-guide\/\" target=\"_blank\" rel=\"noopener\">surface finish guide<\/a> shows which finish fits which job. This removes ambiguity and prevents audit failures.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Temperature Range<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Both 304 and 316 maintain excellent properties across typical food processing temperatures (-20\u00b0C to +200\u00b0C). For high-temperature applications (ovens, heat exchangers), 316\u2019s molybdenum provides better creep resistance. For cryogenic food freezing, both grades remain tough and ductile.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. Budget vs Total Cost of Ownership<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Grade<\/th><th>Price Tier<\/th><th>Initial Cost<\/th><th>Lifecycle Cost<\/th><\/tr><\/thead><tbody><tr><td>430<\/td><td>Lowest<\/td><td>Lowest \u2014 no nickel<\/td><td>High replacement risk in wet environments<\/td><\/tr><tr><td>304 \/ 304L<\/td><td>Mid-Range<\/td><td>Baseline \u2014 best value for general use<\/td><td>Low \u2014 15-30 year service life in appropriate environments<\/td><\/tr><tr><td>316 \/ 316L<\/td><td>Premium<\/td><td>+40-60% over 304<\/td><td>Lowest \u2014 outlasts 304 in aggressive environments by years<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Cost tip:<\/strong> The 40-60% material premium of 316 over 304 is typically recovered within 2-3 years in aggressive environments through reduced maintenance, fewer replacements, and avoided contamination incidents.<\/p>\n<\/blockquote>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-b3e6edf0\" id=\"why-wanzhi\"><h2 class=\"uagb-heading-text\">Why Choose Wanzhi Steel for Food-Grade Stainless Steel?<\/h2><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Own factory:<\/strong> no trading company markups.<\/li>\n\n\n\n<li><strong>Full product range:<\/strong> Sheet, plate, coil, strip, pipe, tube, bar \u2014 one supplier for all your food-grade stainless steel needs.<\/li>\n\n\n\n<li><strong>Food-grade grades:<\/strong> 304, 304L, 316, 316L \u2014 all certified to ASTM A240 \/ ASME SA240.<\/li>\n\n\n\n<li class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-25\"><strong>Surface finishes:<\/strong> 2B, BA, No. 4 brushed, <a href=\"https:\/\/wanzhisteels.com\/mirror-finish-stainless-steel\/\" target=\"_blank\" rel=\"noopener\" title=\"No. 8 mirror\">No. 8 mirror<\/a>, HL hairline, electropolished \u2014 we can meet Ra \u2264 0.8 \u03bcm specifications for food-contact surfaces.<\/li>\n\n\n\n<li><strong>Quality certifications:<\/strong> ASTM, ASME, JIS, DIN standards; third-party inspection (TUV, BV, SGS) accept on request.<\/li>\n\n\n\n<li><strong>Global export experience:<\/strong> Experience in exporting to the UK, Canada, Mexico, Australia, the Middle East, Southeast Asia, South America, and Africa.<\/li>\n\n\n\n<li><strong>Value-added processing:<\/strong> Cut-to-size (laser, plasma, waterjet), bending, forming, polishing, PVC coating, custom export packaging.<\/li>\n\n\n\n<li><strong>Annual capacity:<\/strong> 2,000+ tons of stainless steel produced annually with professional production, quality inspection, and sales teams.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-26 wp-block-paragraph\"><strong>Ready to source food-grade stainless steel?<\/strong> Send us your specification \u2014 grade, product form, dimensions, surface finish, quantity, and applicable standards \u2014 and receive a detailed quotation within 24 hours. <a href=\"#ds-open-popup-1\" title=\"\"><span style=\"text-decoration: underline;\">Contact Wanzhi Steel today<\/span><\/a>.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-f467562c\" id=\"title-10\"><h2 class=\"uagb-heading-text\">FAQ: Stainless Steel for Food Processing<\/h2><\/div>\n\n\n\n<div class=\"wp-block-aioseo-faq\" data-schema-only=\"false\"><h3 class=\"aioseo-faq-block-question\">Is all stainless steel food-grade?<\/h3><div class=\"aioseo-faq-block-answer\">\n<p class=\"wp-block-paragraph\">No. Only grades with sufficient chromium content (\u2265 16%), adequate corrosion resistance, and a hygienic surface finish are suitable for food contact. Common food-grade grades include 304, 304L, 316, 316L, and 430. Grades like 201, 202, and 303 are not food-grade.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-aioseo-faq\" data-schema-only=\"false\"><h3 class=\"aioseo-faq-block-question\">What is the best stainless steel for food processing?<\/h3><div class=\"aioseo-faq-block-answer\">\n<p class=\"wp-block-paragraph\">For general food processing, 304\/304L is the most widely used grade. For environments involving salt, brine, acidic foods, or aggressive cleaning chemicals, 316\/316L is the preferred choice due to its molybdenum content, which significantly improves chloride and acid resistance.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-aioseo-faq\" data-schema-only=\"false\"><h3 class=\"aioseo-faq-block-question\">Is 304 stainless steel food-safe?<\/h3><div class=\"aioseo-faq-block-answer\">\n<p class=\"has-ast-global-color-2-color has-text-color has-link-color wp-elements-27 wp-block-paragraph\">Yes. 304 is among the most common food-grade stainless steels and the <a href=\"https:\/\/www.accessdata.fda.gov\/scripts\/cdrh\/cfdocs\/cfcfr\/CFRSearch.cfm?fr=175.300\" target=\"_blank\" rel=\"noopener nofollow\">FDA treats stainless with 16 percent or more chromium as GRAS for food contact under 21 CFR 175.300<\/a>. However, it is not recommended for high-salt or high-chloride environments where 316 is required.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-aioseo-faq\" data-schema-only=\"false\"><h3 class=\"aioseo-faq-block-question\">What is the difference between 304 and 316 stainless steel for food use?<\/h3><div class=\"aioseo-faq-block-answer\">\n<p class=\"wp-block-paragraph\">316 contains 2-3% molybdenum, which 304 does not have. This dramatically improves resistance to chloride-induced pitting and crevice corrosion. 304 is ideal for general food processing; 316 is necessary for salt\/acid environments. 316 typically costs 40-60% more than 304.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-aioseo-faq\" data-schema-only=\"false\"><h3 class=\"aioseo-faq-block-question\">What surface finish is required for food-grade stainless steel?<\/h3><div class=\"aioseo-faq-block-answer\">\n<p class=\"wp-block-paragraph\">Food-contact surfaces should achieve a maximum surface roughness of Ra \u2264 0.8 \u03bcm (32 \u03bcin), as specified by <a href=\"https:\/\/www.3-a.org\/\" target=\"_blank\" rel=\"noopener nofollow\">3-A<\/a> Sanitary Standards and <a href=\"https:\/\/www.ehedg.org\/\" target=\"_blank\" rel=\"noopener nofollow\">EHEDG<\/a>. This is typically achieved with a No. 4 brushed finish or electropolishing.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-aioseo-faq\" data-schema-only=\"false\"><h3 class=\"aioseo-faq-block-question\">Does food-grade stainless steel need FDA approval?<\/h3><div class=\"aioseo-faq-block-answer\">\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.accessdata.fda.gov\/scripts\/cdrh\/cfdocs\/cfcfr\/CFRSearch.cfm?fr=175.300\" target=\"_blank\" rel=\"noopener nofollow\">FDA recognizes stainless steel with \u2265 16% chromium as GRAS for food contact under 21 CFR 175.300<\/a>. However, food-safety suitability depends on grade, surface finish, intended use, and cleaning conditions. For certified food equipment, NSF\/ANSI 51 and 3-A compliance are typically required in addition.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-aioseo-faq\" data-schema-only=\"false\"><h3 class=\"aioseo-faq-block-question\">Why are 304L and 316L recommended for welded food equipment?<\/h3><div class=\"aioseo-faq-block-answer\">\n<p class=\"wp-block-paragraph\">The &#8220;L&#8221; means low carbon (\u2264 0.03%). During welding, standard grades can suffer carbide precipitation \u2014 sensitization \u2014 making the heat-affected zone vulnerable to intergranular corrosion. L-grades eliminate this risk, making them the standard for welded tanks, pipes, and sanitary assemblies.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-aioseo-faq\" data-schema-only=\"false\"><h3 class=\"aioseo-faq-block-question\">Is 430 stainless steel safe for food contact?<\/h3><div class=\"aioseo-faq-block-answer\">\n<p class=\"wp-block-paragraph\">430 is a ferritic grade (16-18% Cr, no nickel) suitable for some dry or low-corrosion food-contact applications such as countertops and sinks. It is less expensive than 304\/316 but has significantly lower corrosion resistance and is not suitable for wet, acidic, or salt-exposed environments.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-aioseo-faq\" data-schema-only=\"false\"><h3 class=\"aioseo-faq-block-question\">Can Wanzhi Steel supply food-grade stainless steel with custom specifications?<\/h3><div class=\"aioseo-faq-block-answer\">\n<p class=\"wp-block-paragraph\">Yes. Wanzhi Steel operates our own factory with cold rolling, shearing, bending, and surface treatment equipment. We can supply food-grade 304\/316L stainless steel in custom sizes, surface finishes (including Ra \u2264 0.8 \u03bcm polishing), and product forms. Contact us with your specification for a detailed quote within 24 hours.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-0dab0721\"><h2 class=\"uagb-heading-text\">Conclusion<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Stainless steel for food processing<\/strong> remains the benchmark material for modern food manufacturing because it combines hygiene, durability, corrosion resistance, and cost-effectiveness. Whether you are producing food, beverages, dairy products, or pharmaceutical ingredients, choosing the right grade\u2014such as <strong>304, 304L, 316, or 316L stainless steel<\/strong>\u2014can improve equipment reliability, reduce maintenance costs, and support compliance with food safety standards.<\/p>\n\n\n\n<p><strong>Tags:<\/strong><\/p>\r\n<p>\r\n    <span class=\"tag\">stainless steel for food processing<\/span>\r\n    <span class=\"tag\">food grade stainless steel<\/span>\r\n    <span class=\"tag\">304 stainless steel<\/span>\r\n    <span class=\"tag\">316 stainless steel<\/span>\r\n    <span class=\"tag\">food grade stainless steel sheet<\/span>\r\n    <span class=\"tag\">FDA approved stainless steel<\/span>\r\n    <span class=\"tag\">430 stainless steel<\/span>\r\n    <span class=\"tag\">3-A sanitary standards<\/span>\r\n    <span class=\"tag\">EHEDG<\/span>\r\n    <span class=\"tag\">food processing equipment<\/span>\r\n    <span class=\"tag\">sanitary stainless steel<\/span>\r\n    <span class=\"tag\">stainless steel supplier China<\/span>\r\n<\/p>\n\n\n\n<script data-wp-block-html=\"js\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is all stainless steel food-grade?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. Only grades with enough chromium (16 percent or more), good corrosion resistance, and a hygienic finish suit food contact. Common food-grade grades are 304, 304L, 316, 316L, and 430. Grades like 201, 202, and 303 are not food grade.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the best stainless steel for food processing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For general work, 304\/304L is the most used grade. For salt, brine, acidic food, or aggressive cleaning, 316\/316L is the better choice because its molybdenum lifts chloride and acid resistance.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is 304 stainless steel food-safe?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. 304 is among the most common food-grade stainless steels and the FDA treats stainless with 16 percent or more chromium as GRAS for food contact under 21 CFR 175.300. It is not the right call for high-salt or high-chloride service, where 316 is needed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What surface finish is required for food-grade stainless steel?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Contact surfaces should reach Ra 0.8 um (32 uin) or better, per 3-A Sanitary Standards and EHEDG. A No. 4 brushed finish or electropolishing usually gets there.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does food-grade stainless steel need FDA approval?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The FDA recognizes stainless with 16 percent or more chromium as GRAS under 21 CFR 175.300. Suitability still depends on grade, finish, use, and cleaning. Certified equipment typically also needs NSF\/ANSI 51 and 3-A compliance.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is 430 stainless steel safe for food contact?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"430 is ferritic (16 to 18 percent chromium, no nickel) and fits some dry or low-corrosion contact such as countertops and sinks. 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Stainless steel has become the standard material for food processing equipment for good reason. From preparation and storage to transport and packaging, stainless steel [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":28038,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"h1.uagb-heading-text {\n\tfont-size: 42px;\n}","site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"normal-width-container","site-content-style":"unboxed","site-sidebar-style":"unboxed","ast-global-header-display":"","ast-banner-title-visibility":"disabled","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[342,73],"tags":[64],"class_list":["post-28011","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-steel-knowledge","tag-stainless-steel"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"Stainless steel for food processing: SS 304\/316L sheet, coil, pipe &amp; bar. 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Common food-grade grades include 304, 304L, 316, 316L, and 430. Grades like 201, 202, and 303 are not food-grade.","type":"aioseo\/faq"},{"hidden":false,"question":"What is the best stainless steel for food processing?","schemaBlockId":"aioseo-ms5pm7gzhw4y4","tagName":"h3","TrpContentRestriction":{"restriction_type":"exclude","selected_languages":[],"panel_open":true},"UAGHideDesktop":false,"UAGHideMob":false,"UAGHideTab":false,"UAGLoggedIn":false,"UAGLoggedOut":false,"UAGDay":[],"UAGResponsiveConditions":false,"UAGAnimationType":"","UAGAnimationTime":400,"UAGAnimationDelay":0,"UAGAnimationEasing":"ease","UAGAnimationRepeat":false,"UAGPosition":"","UAGStickyLocation":"top","UAGStickyRestricted":false,"UAGStickyOffset":0,"answer":"For general food processing, 304\/304L is the most widely used grade. For environments involving salt, brine, acidic foods, or aggressive cleaning chemicals, 316\/316L is the preferred choice due to its molybdenum content, which significantly improves chloride and acid resistance.","type":"aioseo\/faq"},{"hidden":false,"question":"Is 304 stainless steel food-safe?","schemaBlockId":"aioseo-ms5porvas36vh","tagName":"h3","TrpContentRestriction":{"restriction_type":"exclude","selected_languages":[],"panel_open":true},"UAGHideDesktop":false,"UAGHideMob":false,"UAGHideTab":false,"UAGLoggedIn":false,"UAGLoggedOut":false,"UAGDay":[],"UAGResponsiveConditions":false,"UAGAnimationType":"","UAGAnimationTime":400,"UAGAnimationDelay":0,"UAGAnimationEasing":"ease","UAGAnimationRepeat":false,"UAGPosition":"","UAGStickyLocation":"top","UAGStickyRestricted":false,"UAGStickyOffset":0,"answer":"Yes. 304 stainless steel is one of the most commonly used food-grade stainless steels, recognized by the FDA (21 CFR 175.300) as GRAS when containing \u2265 16% chromium. However, it is not recommended for high-salt or high-chloride environments where 316 is required.","type":"aioseo\/faq"},{"hidden":false,"question":"What is the difference between 304 and 316 stainless steel for food use?","schemaBlockId":"aioseo-ms5pp0olqu20r","tagName":"h3","TrpContentRestriction":{"restriction_type":"exclude","selected_languages":[],"panel_open":true},"UAGHideDesktop":false,"UAGHideMob":false,"UAGHideTab":false,"UAGLoggedIn":false,"UAGLoggedOut":false,"UAGDay":[],"UAGResponsiveConditions":false,"UAGAnimationType":"","UAGAnimationTime":400,"UAGAnimationDelay":0,"UAGAnimationEasing":"ease","UAGAnimationRepeat":false,"UAGPosition":"","UAGStickyLocation":"top","UAGStickyRestricted":false,"UAGStickyOffset":0,"answer":"316 contains 2-3% molybdenum, which 304 does not have. This dramatically improves resistance to chloride-induced pitting and crevice corrosion. 304 is ideal for general food processing; 316 is necessary for salt\/acid environments. 316 typically costs 40-60% more than 304.","type":"aioseo\/faq"},{"hidden":false,"question":"What surface finish is required for food-grade stainless steel?","schemaBlockId":"aioseo-ms5ppdjhiz1oh","tagName":"h3","TrpContentRestriction":{"restriction_type":"exclude","selected_languages":[],"panel_open":true},"UAGHideDesktop":false,"UAGHideMob":false,"UAGHideTab":false,"UAGLoggedIn":false,"UAGLoggedOut":false,"UAGDay":[],"UAGResponsiveConditions":false,"UAGAnimationType":"","UAGAnimationTime":400,"UAGAnimationDelay":0,"UAGAnimationEasing":"ease","UAGAnimationRepeat":false,"UAGPosition":"","UAGStickyLocation":"top","UAGStickyRestricted":false,"UAGStickyOffset":0,"answer":"Food-contact surfaces should achieve a maximum surface roughness of Ra \u2264 0.8 \u03bcm (32 \u03bcin), as specified by 3-A Sanitary Standards and EHEDG. This is typically achieved with a No. 4 brushed finish or electropolishing.","type":"aioseo\/faq"},{"hidden":false,"question":"Does food-grade stainless steel need FDA approval?","schemaBlockId":"aioseo-ms5pq8lsveqy9","tagName":"h3","TrpContentRestriction":{"restriction_type":"exclude","selected_languages":[],"panel_open":true},"UAGHideDesktop":false,"UAGHideMob":false,"UAGHideTab":false,"UAGLoggedIn":false,"UAGLoggedOut":false,"UAGDay":[],"UAGResponsiveConditions":false,"UAGAnimationType":"","UAGAnimationTime":400,"UAGAnimationDelay":0,"UAGAnimationEasing":"ease","UAGAnimationRepeat":false,"UAGPosition":"","UAGStickyLocation":"top","UAGStickyRestricted":false,"UAGStickyOffset":0,"answer":"The FDA recognizes stainless steel with \u2265 16% chromium as GRAS for food contact under 21 CFR 175.300. However, food-safety suitability depends on grade, surface finish, intended use, and cleaning conditions. For certified food equipment, NSF\/ANSI 51 and 3-A compliance are typically required in addition.","type":"aioseo\/faq"},{"hidden":false,"question":"Why are 304L and 316L recommended for welded food equipment?","schemaBlockId":"aioseo-ms5pqezdmmd54","tagName":"h3","TrpContentRestriction":{"restriction_type":"exclude","selected_languages":[],"panel_open":true},"UAGHideDesktop":false,"UAGHideMob":false,"UAGHideTab":false,"UAGLoggedIn":false,"UAGLoggedOut":false,"UAGDay":[],"UAGResponsiveConditions":false,"UAGAnimationType":"","UAGAnimationTime":400,"UAGAnimationDelay":0,"UAGAnimationEasing":"ease","UAGAnimationRepeat":false,"UAGPosition":"","UAGStickyLocation":"top","UAGStickyRestricted":false,"UAGStickyOffset":0,"answer":"The \"L\" means low carbon (\u2264 0.03%). During welding, standard grades can suffer carbide precipitation \u2014 sensitization \u2014 making the heat-affected zone vulnerable to intergranular corrosion. L-grades eliminate this risk, making them the standard for welded tanks, pipes, and sanitary assemblies.","type":"aioseo\/faq"},{"hidden":false,"question":"Is 430 stainless steel safe for food contact?","schemaBlockId":"aioseo-ms5pqvm467h7m","tagName":"h3","TrpContentRestriction":{"restriction_type":"exclude","selected_languages":[],"panel_open":true},"UAGHideDesktop":false,"UAGHideMob":false,"UAGHideTab":false,"UAGLoggedIn":false,"UAGLoggedOut":false,"UAGDay":[],"UAGResponsiveConditions":false,"UAGAnimationType":"","UAGAnimationTime":400,"UAGAnimationDelay":0,"UAGAnimationEasing":"ease","UAGAnimationRepeat":false,"UAGPosition":"","UAGStickyLocation":"top","UAGStickyRestricted":false,"UAGStickyOffset":0,"answer":"430 is a ferritic grade (16-18% Cr, no nickel) suitable for some dry or low-corrosion food-contact applications such as countertops and sinks. It is less expensive than 304\/316 but has significantly lower corrosion resistance and is not suitable for wet, acidic, or salt-exposed environments.","type":"aioseo\/faq"},{"hidden":false,"question":"Can Wanzhi Steel supply food-grade stainless steel with custom specifications?","schemaBlockId":"aioseo-ms5pr33kls34n","tagName":"h3","TrpContentRestriction":{"restriction_type":"exclude","selected_languages":[],"panel_open":true},"UAGHideDesktop":false,"UAGHideMob":false,"UAGHideTab":false,"UAGLoggedIn":false,"UAGLoggedOut":false,"UAGDay":[],"UAGResponsiveConditions":false,"UAGAnimationType":"","UAGAnimationTime":400,"UAGAnimationDelay":0,"UAGAnimationEasing":"ease","UAGAnimationRepeat":false,"UAGPosition":"","UAGStickyLocation":"top","UAGStickyRestricted":false,"UAGStickyOffset":0,"answer":"Yes. Wanzhi Steel operates our own factory with cold rolling, shearing, bending, and surface treatment equipment. We can supply food-grade 304\/316L stainless steel in custom sizes, surface finishes (including Ra \u2264 0.8 \u03bcm polishing), and product forms. Contact us with your specification for a detailed quote within 24 hours.","type":"aioseo\/faq"}],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"BlogPosting","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":"-1","robots_max_videopreview":"-1","robots_max_imagepreview":"large","priority":null,"frequency":"default","local_seo":null,"breadcrumb_settings":null,"limit_modified_date":false,"ai":{"faqs":[],"keyPoints":[],"schemas":[],"titles":[],"descriptions":[],"socialPosts":{"email":{"subject":"","preview":"","content":""},"linkedin":[],"twitter":[],"facebook":[],"instagram":[]}},"created":"2026-07-09 08:53:47","updated":"2026-10-16 03:51:02","seo_analyzer_scan_date":null,"focus_keyword":"stainless steel for food processing","additional_keywords":null,"truseo_locale":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/wanzhisteels.com\/uk\/\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">\u00bb<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/wanzhisteels.com\/uk\/steel-knowledge\/\" title=\"Knowledge\">Knowledge<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">\u00bb<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tStainless Steel for Food Processing | SS 304\/316 Supplier\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/wanzhisteels.com\/uk\/"},{"label":"Knowledge","link":"https:\/\/wanzhisteels.com\/uk\/steel-knowledge\/"},{"label":"Stainless Steel for Food Processing | SS 304\/316 Supplier","link":"https:\/\/wanzhisteels.com\/uk\/stainless-steel-for-food-processing-ss-304-316-supplier\/"}],"uagb_featured_image_src":{"full":["https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/316L-stainless-steel-seamless-pipe-food-grade-steel-pipe.jpg",460,345,false],"thumbnail":["https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/316L-stainless-steel-seamless-pipe-food-grade-steel-pipe-150x150.jpg",150,150,true],"medium":["https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/316L-stainless-steel-seamless-pipe-food-grade-steel-pipe-300x225.jpg",300,225,true],"medium_large":["https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/316L-stainless-steel-seamless-pipe-food-grade-steel-pipe.jpg",460,345,false],"large":["https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/316L-stainless-steel-seamless-pipe-food-grade-steel-pipe.jpg",460,345,false],"1536x1536":["https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/316L-stainless-steel-seamless-pipe-food-grade-steel-pipe.jpg",460,345,false],"2048x2048":["https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/316L-stainless-steel-seamless-pipe-food-grade-steel-pipe.jpg",460,345,false],"trp-custom-language-flag":["https:\/\/wanzhisteels.com\/wp-content\/uploads\/2026\/07\/316L-stainless-steel-seamless-pipe-food-grade-steel-pipe-16x12.jpg",16,12,true]},"uagb_author_info":{"display_name":"wanzhigroup","author_link":"https:\/\/wanzhisteels.com\/uk\/author\/wanzhigroup\/"},"uagb_comment_info":0,"uagb_excerpt":"Your AttractiveStainless Steel for Food Processing | SS 304\/316 Supplier Heading The food processing industry needs materials that stay hygienic, resist corrosion, hold up under daily use, and clean without trouble. 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From preparation and storage to transport and packaging, stainless steel&hellip;","_links":{"self":[{"href":"https:\/\/wanzhisteels.com\/uk\/wp-json\/wp\/v2\/posts\/28011","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wanzhisteels.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wanzhisteels.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wanzhisteels.com\/uk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wanzhisteels.com\/uk\/wp-json\/wp\/v2\/comments?post=28011"}],"version-history":[{"count":0,"href":"https:\/\/wanzhisteels.com\/uk\/wp-json\/wp\/v2\/posts\/28011\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wanzhisteels.com\/uk\/wp-json\/wp\/v2\/media\/28038"}],"wp:attachment":[{"href":"https:\/\/wanzhisteels.com\/uk\/wp-json\/wp\/v2\/media?parent=28011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wanzhisteels.com\/uk\/wp-json\/wp\/v2\/categories?post=28011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wanzhisteels.com\/uk\/wp-json\/wp\/v2\/tags?post=28011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}