規格 |
C |
B |
Si |
Cr |
Ni |
W |
Fe |
HRC |
Fe-60 |
4.0~4.5 |
1.5~2.5 |
2.0~3.0 |
24~30 |
4.0~6.0 |
2~3 |
余 |
≥52 |