GB Q235 B GB/T 700
Low-Alloy High-Strength plate steel Product Introduction
GB Q235 B GB/T 700 steel is produced in a variety of shapes and sizes, suitable for many different applications. This steel material can be used to make machine structural parts, bolts, pins, automotive parts, building supports, rivets and so on. It is also commonly used in the manufacture of vehicles and aircrafts, bridge structures, ships, containers and so on.
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Application: Carbon structural steel.
Heat treated: 1372°C - 1746°C.
Low-Alloy High-Strength plate Product Details
GB Q235 B GB/T 700 Mechanical Properties
Each grade of GB Q235 B 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.
The resistance of GB Q235 B GB/T 700 to damage under load is called its mechanical properties. The mechanical properties of steel materials are the main basis for the design and material selection of parts. The mechanical properties of steel materials will be different with different loading properties (such as tension, compression, torsion, impact and cyclic loads). Common mechanical properties include strength, plasticity, hardness, impact toughness, multiple impact resistance and fatigue limit.
The mechanical properties of GB Q235 B GB/T 700 is in line with GB/T 700. The main properties as below:
| 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) |
|---|---|---|---|---|---|---|
| 786 (≥) | 148 (≥) | 44 | 31 | 11 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 322 |
GB Q235 B GB/T 700 Physical Properties
Heat treatment is also an important factor for GB Q235 B 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.
The physical properties of GB Q235 B GB/T 700 steel incorporate high quality, low weight, solidness, ductility and protection from erosion.
| 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 | - | - | 0.12 | - | |||
| 383 | 682 | - | 22.3 | 242 | - | ||
| 472 | - | 21 | 32.2 | 443 | 144 |
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