Stainless Steel Coil Supplier | 304, 316L, 430

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Stainless steel coils standing on edge on a mill floor with a cold-rolled bright finish

Close-up of a stainless steel coil's cut edge showing the tightly wound strip layers

Walmay supplies stainless steel coil in 201, 304, 304L, 316, 316L, 321, 409L, 430, 443, 317L, 904L and 2205 duplex, in thicknesses from 0.2 mm to 6.0 mm and widths to 1,500 mm. We hold cold-rolled coil in 2B, BA, No.4 and hairline finishes and hot-rolled coil in No.1 pickled condition, slit to any narrower width and recoiled or cut to sheet on request. Stainless steel coil stock ships with an EN 10204 3.1 mill test certificate against ASTM A240, EN 10088-2 or JIS G4305.

Coil and Strip We Stock

Grade	Route	Thickness	Finish	Typical use
201	Hot rolled	2.0-6.0 mm	No.1 pickled	Cost-driven forming, indoor parts
304	Cold rolled	0.3-3.0 mm	2B, BA, No.4	General fabrication, food equipment
316L	Cold rolled	0.3-3.0 mm	BA, mirror	Marine, chemical, decorative
317L	Cold rolled	0.5-3.0 mm	2B	Scrubbers, pulp bleaching
321	Cold rolled	0.5-3.0 mm	2B	Exhaust, expansion joints
409L	Cold rolled	0.6-3.0 mm	2B, 2D	Automotive exhaust
430	Cold rolled	0.3-3.0 mm	2B, BA, No.4	Appliance panels, indoor trim
310S	Hot rolled	2.0-6.0 mm	No.1	Furnace and kiln components
904L	Cold rolled	0.5-3.0 mm	2B	Acid service
2205 duplex	Cold and hot rolled	0.8-6.0 mm	2B, No.1	Pressure parts, heat exchangers

Narrow material below 0.3 mm and slit widths are supplied as stainless steel strip.

Coil Dimensions and Weight to Length Conversion

Buyers order coil by weight but consume it by length, so the conversion drives both purchasing and press planning. Length in metres equals the coil weight in kilograms divided by the width in metres multiplied by the thickness in millimetres multiplied by 8.0.

Thickness	Length in a 3 t coil at 1,219 mm wide	Length in a 3 t coil at 1,000 mm wide
0.3 mm	1,025 m	1,250 m
0.5 mm	615 m	750 m
0.8 mm	385 m	469 m
1.0 mm	308 m	375 m
1.5 mm	205 m	250 m
2.0 mm	154 m	188 m
3.0 mm	103 m	125 m

Parameter	Options
Thickness	0.2-6.0 mm
Width	20-1,500 mm, slit from 1,000 / 1,219 / 1,500 mm master coil
Coil inside diameter	508 mm or 610 mm
Coil outside diameter	Up to 1,500 mm
Coil weight	500 kg to 8 t, or split to your handling limit
Edge	Mill edge or slit edge, deburred on request

Cold Rolled or Hot Rolled

Criterion	Cold rolled coil	Hot rolled coil
Thickness range	0.2-3.0 mm	2.0-6.0 mm and heavier
Surface	2B, BA, No.4, hairline	No.1, pickled and annealed
Thickness tolerance	Tight, typically plus or minus 0.03 mm at 1 mm	Wider, typically plus or minus 0.15 mm
Formability	Excellent, consistent springback	Good, less predictable
Cost per tonne	Higher	Lower
Typical use	Visible panels, deep drawing, appliance work	Structural blanks, heavy pressings, plate feedstock

The practical dividing line is whether the surface will be seen and whether the press tool needs a predictable thickness. Our guide to hot rolled versus cold rolled steel works through the metallurgy, and what cold rolled steel is used for covers the application side.

Tolerances

Nominal thickness	Thickness tolerance	Width tolerance	Flatness
0.2-0.4 mm	plus or minus 0.02 mm	plus or minus 0.2 mm	3 mm per metre
0.4-1.0 mm	plus or minus 0.03 mm	plus or minus 0.3 mm	3 mm per metre
1.0-2.0 mm	plus or minus 0.05 mm	plus or minus 0.4 mm	4 mm per metre
2.0-3.0 mm	plus or minus 0.08 mm	plus or minus 0.5 mm	5 mm per metre
3.0-6.0 mm	plus or minus 0.15 mm	plus or minus 1.0 mm	6 mm per metre

Stainless steel coils wrapped and strapped upright on pallets, ready for export

Slitting, Levelling and Cut to Length

Coil is rarely used as delivered, so we run the secondary operations before it ships. Full detail is on the processing page.

Slitting to any width from 20 mm upward, with deburred or dressed edges
Levelling and tension levelling to 0.1 mm per square metre for architectural panels
Cut to length into sheet, including 4x8 ft blanks, described on the sheet and plate page
Recoiling to a specified coil weight or inside diameter to match your decoiler
Interleaved paper and PVC film on BA, mirror and No.4 finishes

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Surface Finishes

Finish	Description	Where it is specified
No.1	Hot rolled, annealed, pickled; dull and slightly rough	Structural blanks, parts to be painted or coated
2D	Cold rolled and annealed, uniform matte	Deep drawing, where lubricant retention helps
2B	Cold rolled with a light skin pass, smooth grey	The default industrial coil finish
BA	Bright annealed, near-mirror reflectivity	Appliance fronts, reflectors, food equipment
No.4	Unidirectional brushed grain, 150-180 grit	Kitchen equipment, lift panels
Hairline	Long continuous grain	Architectural cladding
Mirror	Polished to high reflectivity	Decorative panels, signage

Slitting line unwinding a stainless steel coil into narrower strip in a mill

Stainless steel strip passing through rollers, showing surface finish and tension control

What Stainless Steel Coil Is Used For

Appliance manufacturing: 430, 201 and 304 in BA or No.4 for appliance exteriors and internal components
Automotive: 409L and 321 for exhaust systems and structural pressings in automotive manufacturing plants
Food and catering equipment: 304 and 316L in 2B or BA for kitchen workspaces and pharmaceutical and food production
Architecture: hairline and No.4 coil levelled and cut into panels for architectural facades and interior spaces
Roll forming: coil fed directly into tube mills and profile lines, including our own pipe and tube production
Solar and energy: 316L and duplex coil for mounting systems in solar energy industrial bases and energy production plants

Our reference on steel coil uses across industries and how to choose goes further into matching grade, finish and thickness to the forming route.

Heating Coils and Coil Tubing Are a Different Product

Searches for a stainless steel coil for heating, a hot tub coil or coil tubing for a heat exchanger are looking for coiled tube, not flat-rolled coil. That product is supplied from our pipe and tube range, normally as 316L seamless tube coiled to a specified diameter, and our note on half-coiled tubes covers the heat transfer version. This page covers flat-rolled coil, the mill product that is unwound and then formed, slit or cut into sheet.

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Ordering and Lead Times

Item	Detail
Minimum order	1 tonne from stock, 3-5 tonnes for mill-rolled grades and finishes
Lead time from stock	7-10 days to loading
Lead time mill run	25-40 days
Incoterms	FOB, CIF, DAP
Packing	Eye-to-sky or eye-to-wall on wooden pallet, steel strapped, moisture barrier
Certification	EN 10204 3.1, SGS inspection on request

To quote we need the grade, thickness, width, finish, coil weight and inside diameter, total tonnage and destination port. Tell us the downstream operation as well, because a coil destined for deep drawing is better ordered in 2D and one destined for a visible panel in BA.

Why Buyers Choose Walmay

Mill relationships with POSCO and Tsingshan keep 304, 316L and 430 coil on the floor rather than on order, and our own slitting, levelling and cut-to-length lines mean the coil arrives in the format your press or shear actually needs. Eleven years of export experience to more than 100 countries, with complete certification on every heat. More on the company is on our about us page and the full range under stainless steel products.

Other forms: sheet and plate, pipe and tube, rod and bar, profiles.

FAQs

What are stainless steel coils used for?

Flat-rolled coil is the feedstock for almost every formed stainless product. It is slit into strip for tube mills and profile lines, cut to length into sheet and blanks, roll formed into panels and sections, and fed directly into presses for appliance housings, sinks, exhaust components and catering equipment. Buying in coil rather than sheet is cheaper per tonne and removes offcut waste when the part is produced in volume.

How much does a coil of stainless steel cost?

Coil is priced per tonne against the current nickel, chromium and molybdenum alloy surcharge, then adjusted for grade, thickness, width, finish and total tonnage. A 3 t coil of 1 mm 304 in 2B therefore has no standing list price. Send the grade, dimensions, finish and tonnage with your destination port and we return a quotation with a stated validity window; our monthly price commentary tracks the underlying inputs.

What is the price of a 304 stainless steel coil?

304 carries roughly 8 percent nickel, so its price follows the LME nickel curve more closely than any other input. Thinner gauges cost more per tonne because of the extra cold rolling passes, and BA or No.4 finishes add a further processing charge over 2B. For a firm figure we need thickness, width, finish, coil weight and quantity.

How much money is a steel coil worth?

It depends entirely on grade and weight. A 5 t coil of 430, which contains no nickel, and a 5 t coil of 316L, which contains both nickel and molybdenum, can differ by a factor of two at the same dimensions. Because the alloy surcharge is reset frequently, coil value is quoted at the time of order rather than held on a price list.

What thickness and width can you supply?

From 0.2 mm to 6.0 mm thick, in widths from 20 mm slit strip up to 1,500 mm master coil. Coil inside diameter is 508 mm or 610 mm, and we can recoil to a specific coil weight so the load matches your decoiler and crane capacity.

Can you slit coil to width and cut it into sheet?

Yes. We slit from 20 mm upward with deburred edges, level to 0.1 mm per square metre where flatness is critical, and cut to length into standard or custom sheet sizes. Having it done at our end usually costs less than the scrap and handling it saves you.

Which finish should I order for a part that will be formed?

For deep drawing, 2D is preferred because the matte surface holds lubricant and reduces galling. For general pressing and fabrication, 2B is the standard. For a visible finished surface, order BA or No.4 with protective PVC film, and plan the tooling to avoid contact with the finished face.

Do you supply mill test certificates with coil?

Yes. Every coil ships with an EN 10204 3.1 certificate carrying the heat number, chemical analysis and mechanical test results, traceable to the melt. Third-party inspection by SGS or an equivalent body can be arranged before loading.

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