国外阀门材料常用技术标准 管道部件用碳钢锻件、计算最小值
| 壁 厚 | 最小伸长率,标距 2in.或50mm,% | |
| 英寸 | 毫米 | |
| 5/16(0.312) | 7.9 | ≥30.00% |
| 9/32(0.281) | 7.1 | ≥28.50% |
| 1/4(0.250) | 6.4 | ≥27.00% |
| 7/32(0.219) | 5.6 | ≥25.50% |
| 3/16(0.188) | 4.8 | ≥24.00% |
| 5/32(0.156) | 4.0 | ≥22.50% |
| 1/8(0.125) | 3.2 | ≥21.00% |
| 3/32(0.094) | 2.4 | ≥19.50% |
| 1/16(0.062) | 1.6 | ≥18.00% |
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