C |
Mn |
Si |
S |
P |
Cr |
Mo |
Cu |
0.11~0.18 |
0.40~0.70 |
0.15~0.35 |
≤0.030 |
≤0.030 |
0.80~1.10 |
0.40~0.60 |
≤0.35 |