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A hot rolled stainless steel plate is a flat product rolled at high temperature, above roughly 1,100°C, where the steel stays soft enough to form thick sections in one pass. The result is a plate with a matte, slightly rough surface (called No.1 after pickling) and a thickness range that cold rolling simply cannot reach. Most buyers turn to it when they need material 3 mm and up, at lower cost, for structures and equipment where the surface look is secondary to strength and corrosion resistance.

We supply hot rolled stainless plates from our own mill, in the common austenitic grades 304/304L and 316/316L, plus 430, 321, 310S and duplex 2205. Below is the full picture: what the process gives you, how it differs from cold rolled, the sizes and grades on offer, where it actually gets used, and how to spec it so you get the right plate the first time.

Stainless starts as a slab, gets heated past its recrystallization point, then runs through a roughing and finishing stand to the target thickness. Because it is worked hot, the mill can make it thick and wide without the steel fighting back. After rolling, the scale is removed by pickling, leaving the characteristic No.1 finish: a dull, grey, matte face.

The “plate vs sheet” split is mostly about thickness. In stainless, anything delivered as individual flat pieces in the medium-to-heavy range (roughly 3 mm and above) is called plate. Thin, coil-derived flat product under about 3–6 mm is sheet. So a 10 mm stainless flat is a hot rolled plate; a 1.2 mm bright 2B panel is a cold rolled sheet. The two are not interchangeable, and the rest of this article explains why.

If you need the smooth, bright, tight-tolerance version of stainless instead, that is our cold rolled stainless steel sheet, made by further rolling hot rolled stock at room temperature.

This is the question every purchaser asks, and the answer decides cost, lead time and whether the part will even fit. The table below contrasts the two on the points that matter in real projects.

Property	Hot Rolled Stainless Plate	Cold Rolled Stainless Sheet
Rolling temperature	Above ~1,100°C (recrystallization)	Near room temperature
Typical thickness	3 –100 mm and up	0.1–6.0 mm
Superficie	No.1, matte, pickled, slight texture	2B, BA, No.4, 8K, smooth and bright
Dimensional tolerance	Wider (±0.3–0.8 mm by thickness)	Tight (±0.05–0.1 mm)
Strength	Annealed, softer, more ductile	Work-hardened, higher yield
Formability	Excellent for bending, welding, cutting	Good for deep drawing, stamping
Cost per kg	Lower (fewer steps)	10–25% higher
Best for	Structures, vessels, heavy equipment	Visible parts, hygienic, precision

Pick hot rolled when thickness is non-negotiable, cosmetics do not matter, and you want to keep cost down. Pick cold rolled when the surface is seen, tolerances are tight, or the gauge is under 3 mm. In the 3–6 mm overlap, base the call on finish and tolerance, not size.

Grade selection comes down to corrosion need and budget. Here is what we keep in hot rolled plate and where each fits.

Calificación	Family	Nickel / Molybdenum	Typical use
304 / 304L	Austenitic	~8% Ni, no Mo	General structure, tanks, architectural, food equipment base
316 / 316L	Austenitic	10–14% Ni, 2–3% Mo	Corrosive, marine, chemical, coastal
430	Ferritic	Nickel-free, magnetic	Indoor trim, appliances, cost-driven parts
321	Austenitic (Ti stabilized)	~9% Ni	High-temperature, welded structures
310S	Austenitic (25Cr-20Ni)	High Ni, Cr	Furnaces, exhaust, high heat
2205 Duplex	Duplex	~5% Ni, 3% Mo	High strength, chloride, offshore

For most structural and tank work, 304 stainless steel sheet grade (delivered as plate) is the default. Step up to 316 stainless steel sheet / 316L when chlorides or chemicals are in play. The 430 stainless steel sheet grade is the low-cost ferritic option for dry indoor use.

Hot rolled plate ships in No.1 as standard: hot rolled, annealed and pickled. It is matte grey, not reflective, and that is fine for most structural and industrial jobs. If the finished part will be visible or need to meet a hygiene spec, the plate gets further treatment after fabrication, not before:

• 2D — cold rolled, annealed, pickled; dull, soft surface.
• 2B — 2D plus a skin pass; smoother grey, the most common cold rolled finish.
• No.4 / HL — brushed, for visible architectural or food surfaces.
• Pickling and passivation — applied to welds and the whole fabricated structure to restore the passive layer.

Starting with No.1 plate avoids paying for a surface finish that welding and assembly will destroy anyway. Many tanks and vessels are pickled and passivated as a complete unit at the end.

• Thickness you cannot get cold rolled. Plates from 3 mm to 100 mm+ in a single hot pass.
• Lower cost per kilogram. Fewer rolling and finishing steps than cold rolled material.
• Easy to fabricate. Cuts, welds, bends and machines well in the annealed condition.
• Good weldability. Especially the L grades (304L, 316L), which avoid sensitization at the seam.
• Structural strength. High yield and toughness for load-bearing and pressure parts.
• Mill-direct supply. We roll it ourselves, so lead times and pricing stay under our control.

Industria	Typical parts	Common grades
Construction & infrastructure	Columns, base plates, bridge parts, frames	304, 316L, 2205
Pressure vessels & tanks	Shells, dished ends, chemical containers	304L, 316L
Shipbuilding & offshore	Decks, hull structures, platforms	316L, 2205
Chemical & petrochemical	Reactors, piping, heat exchangers	316L, 321, 310S
Heavy machinery	Chassis, housings, wear plates	304, 430
Energy & power	Boiler parts, flue gas equipment	310S, 321
Automotive	Chassis, structural members	409, 430, 304

We are an integrated steel producer, not just a trader. The same group runs the acero inoxidable mill that rolls the plate and the equipment shop that fabricates it, so quality is controlled from slab to finished vessel and lead times stay short. We hold ISO 9001, ISO 14001, ISO 45001 and CE/SGS certifications, operate an in-house lab for mechanical and chemical verification, and ship against MTC with optional third-party inspection. For the full range, see all products.

• 304 Stainless Steel Sheet
• 316 Stainless Steel Sheet
• 430 Stainless Steel Sheet
• Cold Rolled Stainless Steel Sheet
• ASTM A240 Certified Stainless Steel Sheet
• Stainless Steel Tanks — wz-mach.com

Etiquetas populares: acero inoxidable sheet Supplier, hot rolled SS plate, HR stainless plate No.1, ASTM A240 stainless plate, 304/316L hot rolled plate