国内阀门材料常用技术标准 电站阀门铸钢件技术条件、铸件化学成分
| 元 素 | 材 料 级 别 | | WC1 | WC6 | WC9 | C12A | | 成分，% | | C | ≤0.25 | 0.05～0.20 | 0.05～0.18 | ≤0.12 | | Mn | 0.50～0.80 | 0.50～0.80 | 0.40～0.70 | 0.30～0.60 | | P | ≤0.035 | ≤0.035 | ≤0.035 | ≤0.020 | | S | ≤0.040 | ≤0.040 | ≤0.040 | ≤0.018 | | Si | ≤0.60 | ≤0.60 | ≤0.60 | 0.20～0.50 | | Ni | — | — | — | ≤0.40 | | Cr | — | 1.00～1.50 | 2.00～2.75 | 8.0～9.5 | | Mo | 0.45～0.65 | 0.45～0.65 | 0.90～1.20 | 0.85～1.05 | | Nb | — | — | — | 0.060～0.10 | | N | — | — | — | 0.030～0.070 | | 元 素 | 规定的残余元素，% | | Al | — | — | — | ≤0.40 | | Cu | ≤0.50 | ≤0.50 | ≤0.50 | — | | Ni | ≤0.50 | ≤0.50 | ≤0.50 | — | | Cr | ≤0.35 | — | — | — | | W | ≤0.10 | ≤0.10 | ≤0.10 | — | | V | — | — | — | 0.18～0.25 | | 残留元素总量 | ≤1.00 | ≤1.00 | ≤1.00 | — |
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