C |
Si |
Mn |
W |
Mo |
Cr |
V |
S |
P |
0.77~0.85 |
0.20~0.40 |
0.20~0.40 |
8.50~9.50 |
2.70~3.30 |
3.60~4.20 |
1.30~1.60 |
≤0.030 |
≤0.030 |