国外阀门材料常用技术标准 奥氏体球墨铸铁件、机械性能要求
元素 | 类型 | ||||||||
D-2 | D-2B | D-2C | D-3 | D-3A | D-4 | D-5 | D-5B | D-5S | |
性能 | |||||||||
抗拉强度,ksi[MPa],≥ | 58[400] | 58[400] | 58[400] | 55[379] | 55[379] | 60[414] | 55[379] | 55[379] | 65[449] |
屈服强度,ksi[MPa],≥ (0.2%残余变形) |
30[207] | 30[207] | 28[193] | 30[207] | 30[207] | … | 30[207] | 30[207] | 30[207] |
2英寸或5mm标距的 延伸率,%,≥ |
8.0 | 7.0 | 20.0 | 6.0 | 10.0 | … | 20.0 | 6.0 | 10 |
布氏硬度(3000kg) | 139-202 | 148-211 | 121-171 | 139-202 | 131-193 | 202-273 | 131-185 | 139-193 | 131-193 |
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