Back (Fe-Base)

1.7225 | 42CrMo4 +AC soft annealed (completely)

Numeric designation1.7225
Chemical designation42CrMo4
State+AC soft annealed (completely)
Etching3% Nital

The micrographs show a completely soft annealed condition. The ferritic matrix contains evenly and finely distributed, moulded-in cementite (spheroidite). In vertical direction, lines of segregation can be seen at low magnification.

The hardness here is 210 HV.