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成分 |
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Mo |
Nb |
Ti |
B |
Q690D |
≤0.18 |
≤0.60 |
≤2.0 |
≤0.030 |
≤0.025 |
≤0.80 |
≤1.00 |
≤0.30 |
≤0.11 |
≤0.020 |
≤0.004 |
向掌柜 范晶晶 提問: