质量等级 |
碳≤ |
猛 |
硅≤ |
磷≤ |
硫≤ |
铝≥ |
牌号 |
A |
0.20 |
1.00~1.60 |
0.55 |
0.045 |
0.045 |
- |
Q345 |
B |
0.20 |
1.00~1.60 |
0.55 |
0.040 |
0.040 |
- |
Q345 |
C |
0.20 |
1.00~1.60 |
0.55 |
0.035 |
0.035 |
0.015 |
Q345 |
D |
0.18 |
1.00~1.60 |
0.55 |
0.030 |
0.030 |
0.015 |
Q345 |
E |
0.18 |
1.00~1.60 |
0.55 |
0.025 |
0.025 |
0.015 |
Q345 |