GB Q420 A GB/T 1591
Low-Alloy High-Strength plate steel Product Introduction
GB Q420 A GB/T 1591 steel is primarily used in construction and shipbuilding, but is also uses in a variety of other applications, such as automotive parts and offshore structures. This steel can also be used in railways and wind power applications. Due to its excellent weldability, GB Q420 A GB/T 1591 steel is often used in industrial piping, storage tanks, and pressure vessels. The high strength to weight ratio of this steel makes it suitable for weight saving designs.
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Application: Low alloy high strength structural steel.
Heat treated: 1668°C - 1161°C.
Low-Alloy High-Strength plate Product Details
GB Q420 A GB/T 1591 Mechanical Properties
GB Q420 A GB/T 1591 steel has a high tensile strength, typically ranging from 500MPa to 900MPa. The yield strength typically ranges from 300MPa to 600MPa. This steel also has a good impact toughness, typically ranging from 15J/cm2 to 20J/cm2. These properties make it suitable for use in load-bearing structures, such as bridges and buildings. This steel also has a high wear resistance, making it suitable for use in shipbuilding and other wear applications.
More detailed information about GB Q420 A GB/T 1591 steel Mechanical Properties, please refer to the following table:
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 816 (≥) | 439 (≥) | 11 | 31 | 33 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 142 |
GB Q420 A GB/T 1591 Physical Properties
The physical properties of GB Q420 A GB/T 1591 include high strength, low weight, durability, ductility and resistance to corrosion. Steel, as we all know, offers great strength though it is light in weight. In fact, the ratio of strength to weight for steel is the lowest than any other building material available to us.
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson's coefficient, ν |
|---|---|---|---|---|---|---|---|
| 43 | - | - | 0.42 | - | |||
| 811 | 685 | - | 32.3 | 434 | - | ||
| 693 | - | 12 | 13.2 | 442 | 241 |
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