GB Grade E GB 712
shipbuilding steel plate Product Introduction
GB Grade E GB 712 is an alloy steel first developed in the People's Republic of China. It was developed in the 1950s to provide a steel grade of superior strength and plasticity for the construction of large infrastructure projects. Initially, it was developed for bridge construction and other heavy steel structures, such as those found in railway lines. As the strength of the steel alloy improved over the years, it became the primary steel used for a variety of uses, including industrial machinery, shipbuilding, marine engineering, and automobile parts.
Our company has established long-term and stable cooperative relations with China Iron and Steel Association, Iron and Steel Association and iron and steel enterprises all over the year, ensuring the production of high-quality GB Grade E GB 712 steel and giving preferential prices. Our GB Grade E GB 712 steel products are exported to more than 70 countries and regions overseas and have received good reviews.
Application: Structural steel for hull.
Heat treated: 1111°C - 1453°C.
shipbuilding steel plate Product Details
GB Grade E GB 712 Chemical element
Carbon, Silicon, Manganese, Phosphorus, Sulfur are the main basic elements in GB Grade E GB 712.
Carbon is the most important hardening element in steel.
Silicon helps to strengthen the strength. Like manganese, silicon is used to maintain the strength of steel during steel production.
Manganese is the important austenite stabilizing elements contribute to the formation of texture structure and increase the firmness, strength and wear resistance.
Phosphorus is a harmful element. Reducing the plasticity and toughness of steel and appearing cold brittleness. It can significantly increase the strength of steel, and improve the atmospheric corrosion stability. The content should be limited to less than 0.05%.
Usually sulfur is a harmful element, which makes the hot brittleness of steel high, and the content of sulfur is limited to less than 0.05%.
| Element | Min | Max | Similar |
|---|---|---|---|
| Ni | - | 0.3000 | - |
| Cr | - | 0.3000 | - |
| Cu | - | 0.3500 | - |
| Al | 0.1500 | - | - |
| S | - | 0.0250 | - |
| P | - | 0.0250 | - |
| Mn | 0.7000 | - | - |
| Si | - | 0.3500 | - |
| C | - | 0.1800 | - |
| Al | 0.0150 | - | - |
| Mn | 0.7000 | 1.2000 | - |
| S | - | 0.0350 | - |
| P | - | 0.0350 | - |
| Al | - | 0.0150 | - |
GB Grade E GB 712 Mechanical properties
More detailed information about GB Grade E GB 712 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) |
|---|---|---|---|---|---|---|
| 697 (≥) | 965 (≥) | 33 | 11 | 31 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 323 |
GB Grade E GB 712 Physical properties
The physical properties of GB Grade E GB 712 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 |
|---|---|---|---|---|---|---|---|
| 32 | - | - | 0.33 | - | |||
| 232 | 923 | - | 44.3 | 134 | - | ||
| 955 | - | 41 | 14.2 | 414 | 441 |
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