牌號(hào) |
C |
Si |
Mn |
P |
S |
V |
Nb |
Al |
Ti |
Q345A |
≤0.20 |
≤0.55 |
1.00-1.60 |
≤0.045 |
≤0.045 |
0.02-0.15 |
0.015-0.060 |
|
0.02-0.20 |
Q345B |
≤0.20 |
≤0.55 |
1.00-1.60 |
≤0.040 |
≤0.040 |
0.02-0.15 |
0.015-0.060 |
|
0.02-0.20 |
Q345C |
≤0.20 |
≤0.55 |
1.00-1.60 |
≤0.035 |
≤0.035 |
0.02-0.15 |
0.015-0.060 |
≥0.015 |
0.02-0.20 |
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