GB Q235A GB/T 700
Low-Alloy High-Strength plate steel Product Introduction
GB Q235A GB/T 700 steel is a Chinese standard steel grade that is widely used in a variety of applications. Different grades have different mechanical properties, so they should be carefully considered and selected when making the decision of which steel to use for a specific project. The chemical composition of this steel is also carefully formulated to enhance the performance of the material in different applications. Heat treatment is also an important factor for GB Q235A GB/T 700 steel and should be carefully considered.
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Application: Carbon structural steel.
Heat treated: 1595°C - 1782°C.
Low-Alloy High-Strength plate Product Details
GB Q235A GB/T 700 Mechanical properties
Each grade of GB Q235A GB/T 700 steel has different mechanical properties. These properties include yield strength, tensile strength, elongation and impact resistance, which is an important indicator of the ability of the material to withstand mechanical shock and overloads. The mechanical properties of the different grades vary and should be carefully considered when selecting the steel for a specific application.
More detailed information about GB Q235A GB/T 700 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) |
|---|---|---|---|---|---|---|
| 626 (≥) | 336 (≥) | 21 | 24 | 12 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 143 |
GB Q235A GB/T 700 Physical properties
Heat treatment is also an important factor for GB Q235A GB/T 700 steel. Different grades need different heat treatments in order to obtain the desired mechanical properties. Generally speaking, heat treatments such as annealing, normalizing, quenching and tempering should be carefully considered.
Physical properties of GB Q235A GB/T 700 mainly cover modulus of elasticity, coefficient of thermal expansion, thermal conductivity, specific thermal capacity, electrical resistance value, density, poisson's ratio, etc.
| 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 |
|---|---|---|---|---|---|---|---|
| 24 | - | - | 0.34 | - | |||
| 853 | 291 | - | 43.3 | 224 | - | ||
| 342 | - | 43 | 43.2 | 213 | 343 |
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