Case-Hardening Steel

CASE-HARDENING STEEL

Steels for carburizing and case hardening typically have a relatively low carbon level, 0.10-0.25% C, and are used when there is a demand for varying properties, such as for components in transmission systems.

Case-Hardening Steel

EN-standardOvakoCommentsCSiMnCrMoNiOther
16MnCr5234, 4306For small-sized transmission components, low core hardness0.160.21.21.0
20MnCr5236, 4326For small-sized transmission components, moderate core
hardness.
0.200.21.31.2
18CrMo8-5*225Steel designed for nitriding but also suitable for carburising0.180.30.81.80.5
20MoCr4124For small-sized bearing and transmission components0.200.20.80.50.4
20NiCrMo2-2152, 4548For small to medium-sized bearing and transmission components0.200.30.90.60.20.5
16NiCrS4146, 4730For medium-sized transmission components0.160.11.01.10.8
20NiCrMo7157For medium-sized bearing and transmission components0.200.20.60.50.21.7
18CrNiMo7-6159, 4761For medium-sized bearing and transmission components0.180.20.71.70.31.6
12NiCr14-6*245For large-sized bearing and transmission components0.130.30.51.50.13.3
18NiCrMo 14-6255For large-sized bearing and transmission components0.180.30.51.40.23.3
22NiCrMo12·5*253For large-sized components requiring high core toughness.0.140.20.61.20.22.9
24NiCrMo15-5*256For large-sized components requiring high core toughness0.240.30.71.20.33.6
20NiMo9-7*158Steel giving reduced surface oxidation after gas carburising0.200.10.30.40.72.3
30MoCrV20-7 *499Temperature resistant carburising steel0.300.20.31.71.8V
16CrMnNiMo9-5-2*277High hardenability grade. Possible to gas/air harden0.160.21.32.10.50.5V
* Designation followed by "*" is not an official EN standard grade but named according to the rules in EN 10027