{"id":2668,"date":"2024-05-29T15:23:00","date_gmt":"2024-05-29T07:23:00","guid":{"rendered":"https:\/\/wanzhisteels.com\/?page_id=2668"},"modified":"2026-10-19T11:32:16","modified_gmt":"2026-10-19T03:32:16","slug":"faq","status":"publish","type":"page","link":"https:\/\/wanzhisteels.com\/ko\/faq\/","title":{"rendered":"Steel procurement FAQ"},"content":{"rendered":"
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FAQ<\/h1><\/div>\n<\/div><\/div>\n\n\n\n
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Steel procurement FAQ: questions buyers ask before ordering<\/h2><\/div>\n\n\n\n

Buying steel for a project means more than comparing a price per kilogram. The questions below come from two places: the questions our own customers at Wanzhi Steel ask most, and the procurement questions international buyers raise across the industry. We have grouped them so you can read the section you need and skip the rest. If your question is not here, our sales team answers within one business day.<\/p>\n\n\n\n

Our product range covers stainless steel<\/a> in coil, sheet, plate, pipe and bar, plus galvanized and color-coated lines. Most of the answers below apply across those products, with stainless examples used where the detail matters.<\/p>\n\n\n\n

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About the supplier<\/h2><\/div>\n\n\n\n

Q: Are you a trading company or a manufacturer?<\/h3>
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A: Wanzhi Steel is an industry and trade company with our own factory. We were founded in 2011 and have since built a mature sales and after-sales team with years of export experience. Working with a supplier that both produces and exports means one point of contact from mill to container, and fewer hands between you and the material.<\/p>\n<\/div><\/div>\n\n\n\n

Q: Can I visit your factory?<\/h3>
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A: Yes. We welcome customers from all over the world to visit our factory. A visit lets you check the production line, the quality lab and the packing process in person. If travel is difficult, we can also arrange an online factory tour by video call.<\/p>\n<\/div><\/div>\n\n\n\n

Q: What certifications do your products have?<\/h3>
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A: Our products are covered by ISO 9001, ISO 14001, ISO 45001, CE, SGS, T\u00dcV, SNI and other certifications. These cover quality management, environmental management, occupational health and safety, and product conformity. For a specific market such as Indonesia (SNI) or the EU (CE), tell us during the inquiry so we can prepare the right documents.<\/p>\n<\/div><\/div>\n\n\n\n

Choosing the right material<\/h2><\/div>\n\n\n\n

Q: How do I choose the right stainless grade?<\/strong><\/h3>
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A: Start with the environment the steel will live in. For most indoor and general fabrication, 304 stainless steel sheet<\/a> is the default. For marine, coastal or chemical service where chlorides are present, 316 stainless steel sheet<\/a> adds molybdenum for better pitting resistance. For structural plate work, hot-rolled stainless plate<\/a> is the common choice. When the grade is still open, send us the end use and we will name the grade rather than leave you guessing.<\/p>\n<\/div><\/div>\n\n\n\n

Q: What thickness and size should I order?<\/h3>
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A: Thickness drives both strength and cost. Thicker material costs more per square meter and is harder to form, while thin gauge is lighter and more flexible. Standard coil and sheet sizes exist, but custom dimensions are normal. For structural parts you can relax the tolerance, while stamped parts often need it within plus or minus 0.1 mm. Tell us the application and we will suggest a workable thickness range.<\/p>\n<\/div><\/div>\n\n\n\n

Q: Which surface finish should I specify?<\/h3>
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A: Finish affects looks, cleanability and cost, not the alloy itself. Our stainless steel surface finish guide<\/a> compares 2B, No.4 and BA in detail. In short: 2B is the cheap functional default, No.4 (brushed) hides fingerprints and suits kitchens and lifts, and BA is bright and reflective for decorative trim. For food and brewery equipment, Wanzhi Machinery builds tanks<\/a> with No.4 or electropolished interiors.<\/p>\n<\/div><\/div>\n\n\n\n

Q: How do I choose the right steel coil size?<\/h3>
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A: Coil size is about more than width and thickness. You also need the inner diameter (commonly 508 mm or 610 mm), the coil weight your uncoiler can handle, and how the coil will be packed and shipped. Our sales manager will help you match the coil dimensions to your slitting and stamping equipment, so do not hesitate to share your line specs.<\/p>\n<\/div><\/div>\n\n\n\n

Quality and certificates<\/h2><\/div>\n\n\n\n

Q: What is an MTC and why do I need one?<\/h3>
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A: MTC stands for Mill Test Certificate, sometimes called a material test report. It records the chemical composition (for example nickel and chromium levels), the mechanical properties (tensile strength and elongation), the heat or lot number, and the standard the material was made to, such as ASTM A240<\/a>. The MTC is your proof that the delivered coil matches the grade on the purchase order. A supplier that refuses to provide an MTC, or provides one without third-party stamps, is a risk signal. The ASTM International<\/a> body sets many of the standards these certificates reference.<\/p>\n<\/div><\/div>\n\n\n\n

Q: Can I request third-party inspection?<\/h3>
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A: Yes. We accept third-party inspection by SGS, BV, T\u00dcV, Intertek or any agency you name. Inspection can cover chemical composition, mechanical properties, thickness tolerance, surface quality and packing. For large or first-time orders, an independent inspection before loading is the single best way to avoid surprises at your port.<\/p>\n<\/div><\/div>\n\n\n\n

Q: How do you guarantee product quality?<\/h3>
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A: We hold ISO and SGS certifications and run our own quality control laboratory. Every process is checked, and we accept third-party testing on top of our in-house checks. Material is traceable through production and test records by heat and lot number, which supports customer audits and warranty claims.<\/p>\n<\/div><\/div>\n\n\n\n

Q: What is material traceability and why does it matter?<\/h3>
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A: Traceability links the steel you receive to its production heat and test records. The items to track are the grade designation, the applicable standard, the heat or lot number, the MTC, and any inspection report. Good traceability matters for controlled manufacturing, quality assurance and customer audits, and it is what lets us act fast if a claim ever arises.<\/p>\n<\/div><\/div>\n\n\n\n

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Samples and customization<\/h2><\/div>\n\n\n\n

Q: Can I get samples before ordering?<\/h3>
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A: Yes. Our samples are usually free. We can also make samples to your technical drawings or specifications so you can check the grade, finish and dimensions before committing to a full order. A small trial order is a sound way to validate a new supplier on quality, packing and documentation before you scale up.<\/p>\n<\/div><\/div>\n\n\n\n

Q: Can you customize to my drawings or specifications?<\/h3>
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A: Yes. We can produce to your data requirements and also customize from your samples or technical drawings. Customization covers grade, dimensions, surface finish, edge condition and any special tolerance your project needs.<\/p>\n<\/div><\/div>\n\n\n\n

Q: What processing services do you offer?<\/h3>
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A: Beyond raw coil and sheet, we handle slitting to exact width, cut-to-length, shearing, leveling, surface finishing (2B, BA, No.4, HL, mirror) and PVC film coating. Requesting these services before shipment reduces handling at your facility and keeps tolerances consistent. Our machinery division applies the same logic to fermentation and mixing tanks<\/a> built to customer drawings.<\/p>\n<\/div><\/div>\n\n\n\n

Ordering, MOQ and quotation<\/h2><\/div>\n\n\n\n

Q: What is your minimum order quantity (MOQ)?<\/h3>
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A: MOQ depends on the product, grade, finish and width. Standard stock items can start from about 10 ton per size, while full container loads (around 25 tonnes) earn the best unit price. Special thicknesses, ultra-wide coils or tight tolerances may carry a higher minimum. Tell us the grade, size and quantity and we will confirm availability and the exact MOQ for your spec.<\/p>\n<\/div><\/div>\n\n\n\n

Q: What details should I include in a request for quotation (RFQ)?<\/h3>
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A clear RFQ leads to an accurate quote and fewer mismatches later. Include these points:<\/p>\n\n\n\n