国外阀门材料常用技术标准 高温耐腐蚀用锻制或轧制的合金管法兰、锻制管件、阀门及零部件化学要求
元素 | 成分,% | ||||
UNS N08026 | UNS N08020 | UNS N08024 | UNS N08367 | UNS R20033 | |
碳 ≤ | 0.03 | 0.07 | 0.03 | 0.030 | 0.015 |
锰 ≤ | 1.00 | 2.00 | 1.00 | 2.00 | 2.0 |
磷 ≤ | 0.03 | 0.045 | 0.035 | 0.040 | 0.02 |
硫 ≤ | 0.03 | 0.035 | 0.035 | 0.030 | 0.01 |
硅 ≤ | 0.50 | 1.00 | 0.50 | 1.00 | 0.50 |
镍 | 33.00-37.20 | 32.00-38.00 | 35.00-40.00 | 23.50-25.50 | 30.0-33.0 |
铬 | 22.00-26.00 | 19.00-21.00 | 22.50-25.00 | 20.00-22.00 | 31.0-35.0 |
钼 | 5.00-6.70 | 2.00-3.00 | 3.50-5.00 | 6.00-7.00 | 0.50-2.0 |
铜 | 2.00-4.00 | 3.00-4.00 | 0.50-1.50 | ≤0.75 | 0.30-1.20 |
铌+钽 | … | 8×C-1.00 | 0.15-0.35 | … | … |
氮 | 0.10-0.16 | … | … | 0.18-0.25 | 0.35-0.60 |
铁 | 残余 A | 残余 A | 残余 A | 残余 A | 残余 A |
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