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%