Carbon Steel

Engineering something interesting? Our quality Carbon Steel can help you make it happen!


Carbon steel stockholders and suppliers, delivering to the whole of the UK. Carbon steel grades are stocked in round bar, flat bar and steel plate. Carbon steel grades such as mild steel S275, S355, EN8 and EN9 can be supplied flame cut from plate. Steel profiles can be cut to your required sizes and if required surface ground on thickness.

If you do no find the a carbon steel specification you require on our web site please contact our sales team who may be able to assist you with your enquiry.

The characteristics of each carbon steel grade is mainly defined by the carbon content. The most common carbon steel grades have a carbon content ranging from 0.05% to 0.60%. For most engineering applications the maximum carbon content is 0.50%, carbon steel grades containing more carbon than this are usually used for tools. Carbon steel specifications are also defined by the addition of elements such as silicon, manganese, sulphur and phosphorous.

We welcome export enquiries for carbon steel. Contact our sales office and consult our shipping policy for further details.

Form of Supply

West Yorkshire Steel are stockholders and suppliers of carbon steel specifications in round bar, flat bar and flame cut plate. Diameters in carbon steel grades can be precision ground to tight tolerances.

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

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

Click on the headings below for further information

Flame Cutting

Flame cut profiles can be supplied to your specific requirements. After flame cutting, steel blanks can be normalised or stress relieved to reduce any hardness on the flame cut edges. Steel profiles can be lumsden ground or precision ground to size on thickness. Flame cut plates can be supplied in a wide variety of carbon steel specifications.

Below we list our most common specifications. If you do not find the grade you require please contact our experienced sales team who may be able to assist you.

BS970 BS EN ASTM ASME
EN8 10025 S275 SA 516 Grade 60
EN9 10025 S275JR SA 516 Grade 65
EN3 10025 S355 SA 516 Grade 70
EN32 10025 S355J2+N A 285 Grade C
080M40 10207 SPH 265
080A42 10028 P265 GH  C45
070M55 10028 P355 NL1
080M46 P256GH, P355NL
080M50 4360 43A
070M20 4360 50B
080M15 4360 50C
080A15 4360 50D
1501 161 430A
1501 161 430B
1501 224 490B LT50
1501 223 490B LT50
1501 225 490B LT50

Carbon steel is available as bright drawn key steel in flat and square sections. With medium tensile strength key steel is used widely in general engineering for components such as plain, gibhead, taper and parallel keys. Key steel is produced to the required tolerances as specified in British Standard BS46 and BS4235.


Carbon spring steel specifications EN42, CS70, CS80, CS95 and CS100 are available as hardened and tempered spring steel strip, annealed spring steel strip, spring steel plate and spring steel sheet. EN43 spring steel is available in bar and plate. The grades commonly conform to BS970, BS1449, BS EN10083-1, BS EN10083-2, BS EN 10277 and BS EN 10278 standards.


X120Mn12 1.3401 is a  manganese steel with 1% carbon steel and an 11% to 14% manganese content supplied in plate. Offering excellent work hardening properties high manganese steel can be supplied in full plates or cut to your requirements.


Heat treatment temperatures for carbon steel specifications, including rate of heating, cooling and soaking times etc. will vary due to factors such as the shape and size of each carbon steel 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 carbon steel grades.


We recommend you contact your welding consumables supplier who should provide you full assistance and information on welding carbon steel grades.


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


All our carbon steel specifications are supplied in accordance with our ISO 9001 : 2008 registration.