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1.7225 | 42CrMo4 nitrocarburized + oxidized - 05
1.7225 | 42CrMo4 nitrocarburized + oxidized - 01
1.7225 | 42CrMo4 nitrocarburized + oxidized - 02
1.7225 | 42CrMo4 nitrocarburized + oxidized - 03
1.7225 | 42CrMo4 nitrocarburized + oxidized - 04
1.7225 | 42CrMo4 nitrocarburized + oxidized - 05

1.7225 | 42CrMo4 nitrocarburized + oxidized

Numeric designation1.7225
Chemical designation42CrMo4
Statenitrocarburized + oxidized
Etching3 % Nital

The bright grain boundary precipitations in the diffusion zone are probably (chromium) nitrides, but could also be cementite. The oxidation after nitrocarburizing serves as corrosion protection; the approx. 1 µm thin oxide layer is only visible in places.

Edge zone

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