GB Grade A32 GB 712 structural steel
shipbuilding steel Product Introduction
GB Grade A32 GB 712 is an alloy steel composed of iron, carbon, and various other elements, such as manganese, silicon, and phosphorus. It has high tensile strength and good toughness, as well as excellent cold forming properties. The alloy steel also has good resistance to heat, wear, and fatigue. It can be easily machined, welded, and formed with very good surface finish results.
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GB Grade A32 GB 712 Chemical Element
What is the chemical composition of GB Grade A32 GB 712? For GB Grade A32 GB 712 element content, please contact us.
| Element | Min | Max | Similar |
|---|---|---|---|
| C | - | 0.1800 | - |
| Si | - | 0.5000 | - |
| Mn | 0.9000 | 1.6000 | - |
| S | - | 0.0350 | - |
| P | - | 0.0350 | - |
| Cr | - | 0.2000 | - |
| Ni | - | 0.4000 | - |
| Mo | - | 0.0800 | - |
| V | 0.0500 | 0.1000 | - |
| Nb | 0.0200 | 0.0500 | - |
| Al | 0.0150 | - | - |
| Ti | - | 0.0200 | - |
| Cu | - | 0.3500 | - |
GB Grade A32 GB 712 Mechanical Properties
The GB Grade A32 GB 712 material mechanical properties shall comply with the values given in 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) |
|---|---|---|---|---|---|---|
| 383 (≥) | 751 (≥) | 23 | 21 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 333 |
GB Grade A32 GB 712 Physical Properties
Physical properties of GB Grade A32 GB 712 are mainly indicated by modulus of electrical resistance value, thermal conductivity, specific thermal capacity, coefficient of thermal expansion, elasticity, poisson's ratio, density, 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 |
|---|---|---|---|---|---|---|---|
| 31 | - | - | 0.33 | - | |||
| 795 | 581 | - | 23.3 | 413 | - | ||
| 227 | - | 42 | 41.2 | 434 | 132 |
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