• High Peak Steels Ltd, Brookfield Ind Est, Peakdale Road, Glossop, Derbyshire, SK13 6LQ

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EN8 (080M40) Engineering steel

EN8 is a medium carbon steel which is used in applications where better properties than mild steel are required, at a lower cost than an alloy, making this an excellent alternative to alloy.

EN8 (080M40) engineering steel is an unalloyed carbon steel with reasonable tensile strength. By heat treating this engineering steel provides a good surface hardness. It can be flame or induction hardened and is a readily machinable material.

When heat treated, EN8 (080M40) offers moderate wear resistance. It shares the same good mechanical properties of EN16 which is more resistant to shear loading and frictional wearing.

Did you know C45 / C40 are European grades, offer similar characteristics and suitable for similar applications, as 080A42 / EN8. So why not speak to High Peak Steels technical team for more details or to discuss a project.

Steel stock range

High Peak Steels stock EN8 (080M40) Black bar in rounds.

Associated standards

UK Standard EN8 | European Grades C40 | Werkstoff 1.0511 | SAE/AISI 1040

Or call 01457 866911 for more details

EN8 (080M40) Black

ProductMin sizeMax size
codes-round225mm dia800mm dia
codes-flat2
codes-square275mm200mm Billet SQ
codes-hex2

EN8 (080M40) Chemical Composition

 CSiMnSPCrNiMo
Min0.360.10.6
Max0.440.410.050.050.30.40.15

EN8 (080M40) Mechanicals

 Yield
N/mm2
0.2% proof
N/mm2
UTS (Rm)
N/mm2
Elong (A)
%
Red of Area (Z)
%
Hardness
HB
Impact Test (KV)
J
Normalised (min)2805501615216
Normalised (max)207
Drawn (min)5106508
Drawn (max)
Quenched & Tempered to condition Q (min)3856251617928
Quenched & Tempered to condition Q (max)229

EN8 (080M40) Typical applications

  • Automotive parts
  • Connecting rods
  • Studs, bolts
  • Axles, spindles
  • General engineering components