GB Grade EH420 GB 712 structural steel
shipbuilding steel Product Introduction
GB Grade EH420 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 EH420 GB 712 Mechanical Properties
The mechanical properties of GB Grade EH420 GB 712 metals determine the range of usefulness of a material and establish the service life that can be expected. Mechanical properties are also used to help classify and identify material.
| 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) |
|---|---|---|---|---|---|---|
| 997 (≥) | 292 (≥) | 43 | 13 | 31 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 232 |
GB Grade EH420 GB 712 Physical Properties
Physical properties of GB Grade EH420 GB 712 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 |
|---|---|---|---|---|---|---|---|
| 43 | - | - | 0.44 | - | |||
| 377 | 569 | - | 11.3 | 213 | - | ||
| 692 | - | 32 | 42.2 | 422 | 441 |
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