GB/T 9711 PSL2 Grade X65Q 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 X65Q before they can be put into use.

Smelting temperature:1349°C - 1632°C

Application:Oil and gas industry, steel pipe for pipeline transportation system

GB/T 9711 PSL2 Grade X65Q Material Chemical Composition

The chemical composition of the GB/T 9711 PSL2 Grade X65Q steel are as follows:

ElementMinMax
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 X65Q Material Mechanical Properties

The mechanical properties of GB/T 9711 PSL2 Grade X65Q steel are also impacted by its chemical composition. The strength of this steel is typically in the range of 410-490 MPa, with the higher end of this range reaching up to 550 MPa. This strength makes it a popular choice for applications that require high durability and strength.Another important property is its tensile strength, which is the maximum force that can be applied to the material before it fails. GB/T 9711 PSL2 Grade X65Q steel typically has a tensile strength of between 620-790 MPa, but it can reach up to 1000 MPa in some grades.

The mechanical properties of the GB/T 9711 PSL2 Grade X65Q steel are as follows:

YieldRp0.2 ≤ 717 (MPa)
TeileRm≤ 343 (MPa)
ImpactKV/Ku42(J)
ElongationA21%
Reduction in cross section on fractureZ42%
As-Heat-Treated ConditionSolution and Aging, Annealing, Ausaging, Q+T,etc
Brinell hardness (HBW)414

GB/T 9711 PSL2 Grade X65Q Material Thermal Properties

The thermal performance parameters of the GB/T 9711 PSL2 Grade X65Q steel are as follows:

Temperature (°C)22437835
Modulus of elasticity (GPa)-245-
Mean coefficient of thermal expaion ×10-6/(°C)--43
Thermal conductivity (W/m·°C)-43.314.2
Specific thermal capacity (J/kg·°C)-241-
Specific electrical resistivity (Ω mm²/m)0.44--
Deity (kg/dm³)--214
Poisson’s coefficient, ν--142

GB/T 9711 PSL2 Grade X65Q Material Machining Technology

GB/T 9711 PSL2 Grade X65Q steel is also highly weldable, which is important for applications that require joining of different pieces of steel. This steel has high levels of carbon and low levels of sulfur, which allows for strong welds that can withstand high temperatures.