GB/T 9711 PSL2 Grade X46Q 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:1968°C - 1761°C
Application:Oil and gas industry, steel pipe for pipeline transportation system
GB/T 9711 PSL2 Grade X46Q Material Chemical Composition
The chemical composition of the GB/T 9711 PSL2 Grade X46Q 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) | - | 1.4000 |
| Silicon (Si) | - | 0.4500 |
| Carbon (C) | - | 0.1800 |
GB/T 9711 PSL2 Grade X46Q Material Mechanical Properties
GB/T 9711 PSL2 Grade X46Q 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 X46Q steel are as follows:
| YieldRp0.2 | ≤ 737 (MPa) |
| TeileRm | ≤ 462 (MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 31% |
| Reduction in cross section on fractureZ | 32% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 421 |
GB/T 9711 PSL2 Grade X46Q Material Thermal Properties
The thermal performance parameters of the GB/T 9711 PSL2 Grade X46Q steel are as follows:
| Temperature (°C) | 43 | 161 | 956 |
| Modulus of elasticity (GPa) | - | 991 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 23.3 | 21.2 |
| Specific thermal capacity (J/kg·°C) | - | 334 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.32 | - | - |
| Deity (kg/dm³) | - | - | 222 |
| Poisson’s coefficient, ν | - | - | 342 |
GB/T 9711 PSL2 Grade X46Q Material Machining Technology
The fatigue performance of GB/T 9711 PSL2 Grade X46Q steel is a critical mechanical property for determining its suitability for use in high-pressure applications. The fatigue performance of GB/T 9711 PSL2 Grade X46Q steel is excellent, which means it can withstand repeated loading without failing. This excellent fatigue performance makes GB/T 9711 PSL2 Grade X46Q steel highly suitable for use in applications such as oil and gas pipelines.