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Carbon steel grade EN8 | 080M40

EN8 | 080M40 Black 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.

Although EN8 | 080M40 is capable of through hardening by quenching and tempering, it is more commonly supplied in the untreated or normalised condition. It possesses good wear resistance, but reduced weldability.

When heat treated it offers moderate wear resistance. It shares the same good mechanical properties of EN16 | 605M36T steel which is more resistant to shear loading and frictional wearing. The increased carbon content provides higher tensile strength and wear resistance compared to 080A42.

Did you know C45 / C40 are European grades, offer similar characteristics and suitable for similar applications, as EN8 | 080A42 steel. 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 steel in round bar.

Associated standards

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

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Order EN8 | 080M40 steel

EN8 Black round

EN8 | 080M40 black steel

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

Typical Applications of EN8 black steel

  • AUTOMOTIVE PARTS
  • CONNECTING RODS
  • STUDS, BOLTS
  • AXLES, SPINDLES
  • GENERAL ENGINEERING COMPONENTS