1.1231 | C67S+I
| Numeric designation | 1.1231 |
|---|---|
| Chemical designation | C67S |
| State | I (isothermally hardened) |
| Etching | 3 % Nital |
The microstructure images show a spring steel that has been isothermally quenched and tempered. The hardness is 540 HV1. There is lower bainite, which is quite coarsely needled.
