1.5026 | 56Si7 quenched and tempered with surface decarburization
| Numeric designation | 1.5026 |
|---|---|
| Chemical designation | 56Si7 |
| State | quenched and tempered with surface decarburization |
| Etching | 3 % Nital |
The spring steel was quenched and tempered to 480 HV0.2, but the heat treatment was not optimal: ferrite residues remained in the quenched and tempered structure, and the rim was decarburized.
