API 5L X70 pipe is a premium grade piping material in API 5L standard specifications. Also called L485 pipe, as it’s yield strength minimum in 485 Mpa (70,300 psi). API 5L X70 covers manufacturing types in seamless and welded (ERW, SAW) types, both applied for oil and gas transmissions.
It contains two product specification levels PSL1, PSL2. (Including the material for sour services uses in PSL2)
API 5L x70 Mechanical Properties
| Grade X70 | Permissible yield point ratio | Yield Strength MPa(min) | Tensile Strength MPa | Elongation % (min) |
| ≤ 0.85 | 480 | 600 - 750 | - |
API 5L x70 Chemical Composition
| Grades | Material number | C max | Si max | Mn. mix | P max | S max |
| X70 | 1.8977 | 0.04-0.16 | 0.55 | 1.10-1.70 | 0.035 | 0.035 |
Advantages of API 5L x70 pipe
a. High strength
b. High resistance to dynamic tearing
c. High low temperature impact toughness
d. Low ductile-brittle transition temperature
e. Acid service suitability
f. Economy and long lasting
Its excellent performance is due to the ultra-low carbon acicular ferrite structure, high density dislocations interact with fine precipitation phases.
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