Steel grade EN39B

EN39B (835M15) Engineering steel

EN39B (835M15) grade steel is a 4.5% nickel-chromium-molybdenum case hardening steel which may be carburised and hardened in large sections to produce a hard wear resistance case, and developing a core strength of the order of 1310N/mm ² with good resistance to shock.

Steel stock range

High Peak Steels stock offer EN39B (835M15) in black steel round bar.

Associated standards

UK Standard EN39B

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EN39B (835M15) black steel

ProductMin sizeMax size
codes-round238mm dia140mm dia

EN39B (835M15) Chemical Composition

 CSiMnSPCrNiMo
Min0.120.100.251.003.900.15
Max0.180.350.500.0400.0351.404.300.30

EN39B (835M15) 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
Annealed (min)
Annealed (max)277
Q&T capability test on 19mm sample (min)13108
Q&T capability test on 19mm sample (max)

Typical Applications of EN39B steel

  • HIGH DUTY GEARS
  • HEAVY DUTY WORMS
  • HEAVY ROLLER BEARINGS
  • BREECH MECHANISMS
  • VALVE ROCKERS
  • SMALL ARMS COMPONENTS
  • CAMSHAFTS
  • CLUTCH PLATES