GB/T 9711 PSL2 Grade L415Q Introduce
GB/T 9711 PSL2 Grade L415Q steel is an alloy steel widely used in the production of steel pipes due to its corrosion resistance and mechanical properties. The chemical composition of this steel includes low levels of carbon, high levels of manganese, chromium, molybdenum, copper and nickel, which all aid in its ability to resist corrosion and increase its strength. Mechanical properties such as yield strength, tensile strength and ductility are also superb for this material. Additionally, its weldability makes it an ideal choice for welding applications.
Smelting temperature:1342°C - 1751°C
Application:Oil and gas industry, steel pipe for pipeline transportation system
GB/T 9711 PSL2 Grade L415Q Material Chemical Composition
The chemical composition of the GB/T 9711 PSL2 Grade L415Q steel are as follows:
| Element | Min | Max |
|---|---|---|
| Sulfur (S) | - | 0.0150 |
| PhOsphorus (P) | - | 0.0250 |
| Manganese (Mn) | - | 1.7000 |
| Silicon (Si) | - | 0.4500 |
| Carbon (C) | - | 0.1800 |
GB/T 9711 PSL2 Grade L415Q Material Mechanical Properties
The yield strength of GB/T 9711 PSL2 Grade L415Q steel is also important as it defines the limit of the material's elasticity before it permanently deforms. The yield strength of the steel ranges anywhere from 320-480 MPa, with some grades having a yield strength of up to 550 MPa.
The mechanical properties of the GB/T 9711 PSL2 Grade L415Q steel are as follows:
| YieldRp0.2 | ≤ 171 (MPa) |
| TeileRm | ≤ 888 (MPa) |
| ImpactKV/Ku | 23(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 24% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 332 |
GB/T 9711 PSL2 Grade L415Q Material Thermal Properties
The thermal performance parameters of the GB/T 9711 PSL2 Grade L415Q steel are as follows:
| Temperature (°C) | 14 | 257 | 175 |
| Modulus of elasticity (GPa) | - | 635 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 32.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 324 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.41 | - | - |
| Deity (kg/dm³) | - | - | 411 |
| Poisson’s coefficient, ν | - | - | 122 |
GB/T 9711 PSL2 Grade L415Q Material Machining Technology
The advantages of machining GB/T 9711 PSL2 Grade L415Q steel include improved product accuracy and precision, increased production efficiency, and reduced costs. In addition, the surface finish of the machined component can be enhanced, which can help to increase its longevity. On the other hand, the machining of GB/T 9711 PSL2 Grade L415Q steel can also lead to an increase in tool wear, an increase in residual stress, and even deformation of the part.