国外阀门材料常用技术标准 球墨铸铁件、拉伸性能
| 
 牌号 60-40-18  | 
 牌号 65-45-12  | 
 牌号 80-55-06  | 
 牌号 100-70-03  | 
 牌号 120-90-02  | 
|
| 抗拉强度,psi,≥ | 60000 | 65000 | 80000 | 100000 | 120000 | 
| 抗拉强度,Mpa,≥ | 414 | 448 | 552 | 689 | 827 | 
| 屈服强度,psi,≥ | 40000 | 45000 | 55000 | 70000 | 90000 | 
| 屈服强度,Mpa,≥ | 276 | 310 | 379 | 483 | 621 | 
| 
 2 in或50mm标距的 延伸率,%,≥  | 
18 | 12 | 6.0 | 3.0 | 2.0 | 
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