国内阀门材料常用技术标准 合金结构钢材(或坯)的化学成分允许偏差
钢类 | P | S | Cu | Cr | Ni | Mo |
不大于 | ||||||
优 质 钢 | 0.035 | 0.035 | 0.30 | 0.30 | 0.30 | 0.15 |
高级优质钢 | 0.025 | 0.025 | 0.25 | 0.30 | 0.30 | 0.10 |
特级优质钢 | 0.025 | 0.015 | 0.25 | 0.30 | 0.30 | 0.10 |
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