GB/T 9711 PSL2 Grade X52Q Introduce
GB/T9711 has five grade groups and each grade group has several levels. Grade A to Grade D are the commonly used types and Grade E is the special type. High-Strength Steel Delivery Conditions: Hot-Rolled Plates, Cold-Rolled Sheets, Cold-Formed and Cold-Rolled Sections:Grade A - General-Purpose, low-temperature and higher temperature strengthened steels, corresponding to Q235A, Q235B, Q275A, Q275B
Grade B - Q345A, Q345B, Q390A and Q390B, corresponding to 16Mn, 18Mn, 20MnV and 27MnCr
Grade C - Q420A, Q420B, Q420C and Q420D, corresponding to 17Mn4, 19Mn5, 15MnV, 13MnNiCrMo
Grade D - Q460A, Q460B, Q460C and Q460D, corresponding to 14MnNb, 16MnRE, 18MnCbV
Grade E - Rare Types
EO, NACE, MRO-175, HIC, SSCC and Sour Service are considered as special requirements, so they are listed as grade E. This grade also includes J55, L80, N80, T95, and P110.
Smelting temperature:1396°C - 1686°C
Application:Oil and gas industry, steel pipe for pipeline transportation system
GB/T 9711 PSL2 Grade X52Q Material Chemical Composition
The chemical composition of the GB/T 9711 PSL2 Grade X52Q steel are as follows:
| Element | Min | Max |
|---|---|---|
| Titanium (Ti) | - | 0.0400 |
| Niobium (Nb) | - | 0.0500 |
| Vanadium (V) | - | 0.0500 |
| 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 X52Q Material Mechanical Properties
The yield strength of GB/T 9711 PSL2 Grade X52Q 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 X52Q steel are as follows:
| YieldRp0.2 | ≤ 819 (MPa) |
| TeileRm | ≤ 516 (MPa) |
| ImpactKV/Ku | 11(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 24% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 421 |
GB/T 9711 PSL2 Grade X52Q Material Thermal Properties
The thermal performance parameters of the GB/T 9711 PSL2 Grade X52Q steel are as follows:
| Temperature (°C) | 21 | 961 | 457 |
| Modulus of elasticity (GPa) | - | 994 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 124 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.33 | - | - |
| Deity (kg/dm³) | - | - | 321 |
| Poisson’s coefficient, ν | - | - | 424 |
GB/T 9711 PSL2 Grade X52Q Material Machining Technology
The advantages of machining GB/T 9711 PSL2 Grade X52Q 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 X52Q steel can also lead to an increase in tool wear, an increase in residual stress, and even deformation of the part.