GB/T 9711 PSL2 Grade L390Q Introduce
GB/T 9711 is the standard of petroleum and natural gas industries, which specifies the steel pipe properties and materials, transportation technical conditions and test methods. Steel pipes must meet the requirements of GB/T 9711 PSL2 Grade L390Q before they can be put into use.
Smelting temperature:1956°C - 1245°C
Application:Oil and gas industry, steel pipe for pipeline transportation system
GB/T 9711 PSL2 Grade L390Q Material Chemical Composition
The chemical composition of the GB/T 9711 PSL2 Grade L390Q steel are as follows:
| Element | Min | Max |
|---|---|---|
| Titanium (Ti) | - | 0.0400 |
| Niobium (Nb) | - | 0.0500 |
| Vanadium (V) | - | 0.0700 |
| Sulfur (S) | - | 0.0150 |
| PhOsphorus (P) | - | 0.0250 |
| Manganese (Mn) | - | 1.5000 |
| Silicon (Si) | - | 0.4500 |
| Carbon (C) | - | 0.1800 |
GB/T 9711 PSL2 Grade L390Q Material Mechanical Properties
GB/T 9711 PSL2 Grade L390Q steel also has excellent ductility, which makes it an ideal choice for applications that require bending and forming. The steel has an elongation rate of between 20 and 30%, which ensures excellent formability without sacrificing strength.
The mechanical properties of the GB/T 9711 PSL2 Grade L390Q steel are as follows:
| YieldRp0.2 | ≤ 129 (MPa) |
| TeileRm | ≤ 994 (MPa) |
| ImpactKV/Ku | 32(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 42% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 142 |
GB/T 9711 PSL2 Grade L390Q Material Thermal Properties
The thermal performance parameters of the GB/T 9711 PSL2 Grade L390Q steel are as follows:
| Temperature (°C) | 43 | 974 | 342 |
| Modulus of elasticity (GPa) | - | 787 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 41.3 | 43.2 |
| Specific thermal capacity (J/kg·°C) | - | 344 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.11 | - | - |
| Deity (kg/dm³) | - | - | 333 |
| Poisson’s coefficient, ν | - | - | 413 |
GB/T 9711 PSL2 Grade L390Q Material Machining Technology
The yield strength and tensile strength of GB/T 9711 PSL2 Grade L390Q steel are important mechanical properties for determining the material's suitability for use in high-pressure environments such as oil and gas pipelines. The yield strength of GB/T 9711 PSL2 Grade L390Q steel is 415 MPa, which is relatively high compared to other steels. The tensile strength of GB/T 9711 PSL2 Grade L390Q steel is upwards of 535 MPa. This combination of high tensile and yield strength makes GB/T 9711 PSL2 Grade L390Q steel highly suitable for use in high pressure applications.