国内阀门材料常用技术标准 碳素钢锻件技术条件、化学成分
| 牌号 | 含量/%[除给出范围外,含量(%)均为最大值] | |||||||||
| C | Mn | P | S | Si | Cu | Ni | Cr | Mo | V | |
| A105 | 0.35 | 0.60~1.05 | 0.035 | 0.04 | 0.10~0.35 | 0.40 | 0.40 | 0.30 | 0.12 | 0.08 |
| 25 | 0.22~0.29 | 0.50~0.80 | 0.035 | 0.035 | 0.17~0.37 | 0.25 | 0.25 | 0.25 | — | — |
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