Stainless Steel

ISO certified stainless steel that shines on through without a care that rust never sleeps


Stainless steel stockholders and suppliers, delivering to the whole of the UK. Stainless steel grades are stocked in round bar, flat bar and plate (plasma cut). Specifications supplied include precipitation hardening, austenitic and martensitic. Stainless steel grades are supplied in a large range conforming to British, European, American and International standards.

Stainless steel is held on stock and can be delivered throughout the UK.  All orders are supplied in accordance with our ISO 9001 accreditation.

Popular grades we supply:  17/4PH | FV520B | S31254 | 904L | 310 | 321 | 316 | 440B | 440C | 420 | 410 | 416 | 431 | 301 | 304

Form of Supply

West Yorkshire Steel are stainless steel suppliers and stockholders of round bar, flat bar, sheet and plate. Diameters can be sawn to your required lengths as one offs or multiple cut pieces.

Plasma cut stainless steel plates can be cut to your required sizes, we can also guillotine stainless steel sheet.

Ground stainless steel bar can be supplied, providing a quality precision finished bar to your required tolerances.

Contact our experienced sales team who will assist you with your enquiry.

  • Sheet
  • Plate
  • Flat
  • Diameter
  • Hexagonal
  • Tube

Click on the headings below for further info

Precipitation Hardening Stainless

The main characteristics of precipitation hardening stainless specifications are the combination of the corrosion resistance of an austenitic stainless with the hardenability of a martensitic stainless.

ASTM Werkstoff DIN Firth Vickers
17/4PH 1.4542 X5CrNiMoCuNb145PH FV520B
A564 Grade 630 1.4594

High contents of chromium, nickel, molybdenum and nitrogen give high alloyed austenitic stainless steel grades different characteristics to those of standard austenitic specifications. 904L has similar mechanical properties to the more common austenitic grades but has superior resistance to uniform corrosion. UNS S31254 provides exceptionally good resistance to uniform corrosion combined with higher strength and mechanical properties than the more common austenitic grades.

UNS AISI Werkstoff Outokumpu
S31254 904L 1.4547 254SMO
N08904 1.4539 6Mo (Moly)
EN10272

With the average chromium content of 18% and nickel content of 8% austenitic stainless steels are sometimes referred to as 18/8 (although the actual chromium and nickel content can vary from these figures). Austenitic stainless steels are non magnetic and cannot be hardened by heat treatment, though they can strain harden rapidly when cold worked.

BS970 AISI Werkstoff DIN UNS
316S11 310 1.4845 X5CrNi18-10 S31000
316S15 316L 1.4541 X5CrNi 18-10 S31008
310S24 316 1.4571 X8CrNiS18-9 S32100
321S31 316Ti 1.4301 X8CrNiS18-9 S30400
304S31 321 1.4305 X2CrNi 19-11 S30300
304S15 304 1.4306 X6CrNiTi 18-10 S30403
303S21 304L 1.4307 X12CrNi 25-21 S30100
304S11 303 1.4310 X6CrNiMoTi 17-12-2 S31600
EN58E 301 1.4539 S31603
EN58AM 1.4404 S31635
EN58M
EN58E
EN58B

Heat treated martensitic stainless steel grades offer high strength and hardness. Martensitic grades can be heat treated due to having higher carbon content than other types of stainless steel. Martensitic grades are less ductile than other types of stainless steel. These grades are magnetic and are best suited for applications which require good corrosion resistance with good mechanical properties.

BS970 AISI Werkstoff DIN UNS
416S21 440B 1.4112 X12CrS13 S41000
410S21 440C 1.4125 X12Cr13 S42000
420S29 420 1.4057 X20Cr13 S43100
420S37 410 1.4005 X30Cr13 S44003
420S45 416 1.4006 X17CrNi16-2 S44004
431S29 431 1.4021 X90CrMoV18
EN56AM 1.4208 X105CrMo17
EN56A
EN56C
EN56D
EN57

301 spring temper rolled stainless steel available in sheet and strip. Combining high strength and hardness with corrosion resistance similar to 304.


Heat treatment is only suitable for specific grades of stainless. When heat treating a stainless the hardening temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each  component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of stainless steel grades.


Stainless steel is available with BS EN 10204 3.1 mill certificate, please request when placing any orders.


All our stainless steel grades are supplied in accordance with our ISO 9001:2015 registration.


  • West Yorkshire Steel has been selling Stainless Steel for over 50 years and has established itself as one of the UK’s leading suppliers of Stainless Steel.
  • Large stock range.
  • Reliable on time delivery throughout the UK, all items packaged safe and secure.
  • Knowledgeable team with decades of experience – our sales team are responsive and reliable.
  • Trusted by thousands of engineers and tool makers – 5 star Google reviews
  • Long-standing customer relationships – reliable supplier to customers old and new.
  • Trusted for quality, we are an ISO 9001 certified steel supplier.

What Our Customers Say

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Paul Wragg
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Great service from order to delivery. A pleasure to deal with.
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Mark Amiss
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I've found West Yorshire Steel to be very helpful, when in the need of specialist material.
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Ian Hutchings (Hutch)
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Only company we could find that could supply the special steel we were looking for at a good price and quick delivery. A pleasure to deal with.
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jason Platten
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Always receive pricing in good time and deliveries always meet our deadlines.
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Graeme Glover
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I am most impressed with the service that I received from West Yorkshire Steel. They supplied me with an unobtainable type of Steel in Australia and had it shipped half way across the world to me. I sourced this steel for an old mate of mine so that he could make engine bearings for his Classic French Sports car, he is 96 years young and WYS made him very happy. I would have no hesitation in recommending your Company in the future. Cheers Graeme Glover
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Chaz Jones
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Helpful service and fast delivery for small diameter Imperial sized EN16T. Thanks!
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Steve White
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Great company to deal with, friendly, super efficient, good price, and it was even delivered early! We buy a lot of small quantities of odd materials and will definitely be using them again. Thank you

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