API SPEC 5L Grade L690Q - PSL2 Introduce
API SPEC 5L Grade L690Q - PSL2 is a steel pipe specification for pipeline transportation, published by the American Petroleum Institute (API). API SPEC 5L specifies a range of requirements, including chemical composition, mechanical properties, dimensions, and physical characteristics of steel pipes. These requirements are designed to ensure that the steel pipes have sufficient strength, toughness, and corrosion resistance to meet the demands of various environments.
Smelting temperature:1178°C - 1926°C
Application:Line pipe
API SPEC 5L Grade L690Q - PSL2 Material Mechanical Properties
API SPEC 5L is a widely recognized standard for steel pipes used in pipeline transportation. This specification covers requirements for materials, manufacture, testing, and use of steel pipes for conveying oil, gas, water, and other liquids or gases. One of the key aspects of API SPEC 5L is its mechanical properties, which are essential to ensuring the safe and reliable operation of pipelines.
The mechanical properties of the API SPEC 5L Grade L690Q - PSL2 steel are as follows:
| YieldRp0.2 | ≤ 657 (MPa) |
| TeileRm | ≤ 693 (MPa) |
| ImpactKV/Ku | 14(J) |
| ElongationA | 31% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 231 |
API SPEC 5L Grade L690Q - PSL2 Material Thermal Properties
The thermal performance parameters of the API SPEC 5L Grade L690Q - PSL2 steel are as follows:
| Temperature (°C) | 23 | 858 | 929 |
| Modulus of elasticity (GPa) | - | 526 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 343 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.42 | - | - |
| Deity (kg/dm³) | - | - | 434 |
| Poisson’s coefficient, ν | - | - | 242 |