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100CrMn6 1.3520 Oil Hardening Tool Steel

100CrMn6 1.3520 Oil Hardening Tool Steel oil hardening tool steel 100CrMn6 1.3520 Oil Hardening Tool Steel 100CrMn6 1

100CrMn6 1.3520 Oil Hardening Tool Steel


Medium alloy, oil hardening tool steel, which is hard-wearing.


Roller bearings with thickness up to 50 mm.

Quality Standard:

DIN 17230-1980 Ball and Roller Bearing Steels

All Grades Comparison:

Material No. EN
1.3520 100CrMn6

Chemical Composition(%)

C Si Mn P S Cr Ni Cu
0.90-1.05 0.50-0.70 1.00-1.20 0.030 max 0.025 max 1.40-1.65 0.30 max 0.30 max


  • NORMALIZING: Normalizing temperature: 860-900oC.
  • SOFT ANNEALING: Heat to 760-800oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 217.
  • STRESS RELIEVING: Stress relieving to remove machining stresses should be carried out by heating to approx. 650oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
  • HARDENING: Harden from a temperature of 830-890oC followed by oil quenching. Hardness after quenching is approx. 64 HRC.
  • TEMPERING: Tempering temperature: 150-180oC.

Mill′s test certificate:

EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.