牌號(hào) |
化學(xué)成分% |
|||||||||
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Cu |
Mo |
其他 |
|
45 |
0.42-0.50 |
0.17-0.37 |
0.50-0.80 |
≤0.35 |
≤0.35 |
≤0.25 |
≤0.25 |
≤0.20 |
- |
- |
27SiMn |
0.24-0.32 |
1.10-1.40 |
1.10-1.40 |
≤0.35 |
≤0.35 |
≤0.25 |
≤0.25 |
≤0.20 |
≤0.15 |
- |
牌號(hào) |
機(jī)械性能 |
|||||||||
抗拉強(qiáng)度MPa |
屈服強(qiáng)度MPa |
延伸率% |
沖擊功J |
硬度HBS |
||||||
45 |
≥600 |
≥355 |
≥16 |
≥39 |
≤197 |
|||||
27SiMn |
≥980 |
≥835 |
≥12 |
≥39 |
≤217 |