国外阀门材料常用技术标准 抗拉强度碳钢螺栓和螺柱、A级和B级的螺栓和螺柱的化学成分要求
熔练分析 | 产品分析 | ||
C | ≤0.29 | ≤0.33 | |
Mn | ≤1.20 | ≤1.25 | |
P | ≤0.04 | ≤0.041 | |
S | A级 | ≤0.15 | A |
B级 | ≤0.05 | ≤0.051 |
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