| Grade1 | Grade2 |
PC No. 479―M75480 | PC No. 975―Heat Id M75483 | |
Critical element―Carbon | 0% - 0.06 % | 0.0% - 0.07% |
Actual % C | 0.03% | 0.068% |
Critical element―Manganese | 0.5% - 0.55 % | 0.27% - 0.35% |
Actual % Mn | 0.504% | 0.335% |
Critical element―Silicon | 0.018% - 0.028 % | 0.035% - 0.07% |
Actual % Si | 0.024% | 0.047% |