| 尺寸公差 | | 标准 | 外径公差 | 壁厚公差 | | A25.A.B | X42-X70 | | D<60.3 | +0.41/-0.40mm | D<73 | +20/-12.5% | D≥73 | +15/-12.5% | | API SPEC 5L | D≥60.3 | +0.75/-0.40mm | D≥73 | +15/-12.5% | D>73 | +15/-12.5% |
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机械性能
| | 标准 | 纲级 | 屈服强度(MPa) | 抗拉强度(MPa) | 延伸率 | | API SPEC 5L | PSL1 | | | A25 | 172 | 310 | | A | 207 | 331 | | B | 241 | 414 | | X42 | 290 | 414 | | X46 | 317 | 434 | | X52 | 359 | 455 | | X56 | 386 | 490 | | X60 | 414 | 517 | | X65 | 448 | 531 | | X70 | 483 | 565 | | PSL2 | | Min | Max | Min | Max | | B | 241 | 448 | 414 | 758 | | X42 | 290 | 496 | 414 | 758 | | X46 | 317 | 524 | 434 | 758 | | X52 | 359 | 531 | 455 | 758 | | X56 | 386 | 544 | 490 | 758 | | X60 | 414 | 565 | 517 | 758 | | X65 | 448 | 600 | 531 | 758 | | X70 | 483 | 621 | 565 | 758 | | X80 | 552 | 690 | 621 | 827 |
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| 化学成份 | | 标准 | 钢级 | C | Mn | P | | S | | Max | Max | Min | Max | Max | | API SPEC 5L | PSL1 | | A25II | 0.21 | 0.60 | | 0.030 | 0.030 | | A25III | 0.21 | 0.60 | 0.45 | 0.80 | 0.030 | | A | 0.22 | 0.90 | | 0.030 | 0.030 | | B | 0.28 | 1.20 | | 0.030 | 0.030 | | X42 | 0.28 | 1.30 | | 0.030 | 0.030 | | X46.X52.X56 | 0.28 | 1.40 | | 0.030 | 0.030 | | X60.X65.X70 | 0.28 | 1.40 | | 0.030 | 0.030 | | PSL2 | | B | 0.24 | 1.20 | | 0.025 | 0.015 | | X42 | 0.24 | 1.30 | | 0.025 | 0.015 | | X46.X52.X56 | 0.24 | 1.40 | | 0.025 | 0.015 | | X60.X65.X70.X80 | 0.24 | 1.40 | | 0.025 | 0.015 |
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