API 5L X70 steel specification for line pipe.
API 5L X70 steel is to provide standards for pipe suitable for use in conveying gas,water,and oil in both the oil and natural gas industries.
API 5L X70 PSL1 steel chemical composition-% by mass*
| Grade | C max | Mn max | P max | S max | Ti max |
| API 5L X70 PSL1 | seamless | ||||
| 0.28 | 1.40 | 0.030 | 0.030 | 0.06 | |
| Welded | |||||
| 0.26 | 1.65 | 0.03 | 0.03 | 0.06 | |
API 5L X70 PSL2 steel chemical composition-% by mass*
| Grade | C max | Mn max | P max | S max | Ti max |
| API 5L X70 PSL2 | seamless | ||||
| 0.24 | 1.40 | 0.025 | 0.015 | 0.06 | |
| Welded | |||||
| 0.22 | 1.65 | 0.025 | 0.015 | 0.06 | |
API 5L X70 mechanical properties:
| Grade X70 | Permissible yield point ratio | Yield Strength MPa(min) | Tensile Strength MPa |
| ≤ 0.85 | 483 | 565 |
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