GB Grade AH 550 GB 712
shipbuilding steel plate Product Introduction
GB Grade AH 550 GB 712 is the most popular, versatile, and preferred steel grade in China. It is used in a variety of industries such as construction, industrial, military, and marine applications. It is also one of the most commonly used steel grades in Europe and the United States.
We are GB Grade AH 550 GB 712 supplier and exporter, GB Grade AH 550 GB 712 producer and stock keeper. For the commonly used size , we usually have stock resources and arrange delivery within 10 days. GB Grade AH 550 GB 712 is fist product of our company. Our not only enjoys first class quality on the market, but also competitive with reasonable price and thoughtful after service. Over the past 20 years, Our GB Grade AH 550 GB 712 products are exported to more than 70 countries and areas.
Application: Structural steel for ships and marine engineering.
Heat treated: 1524°C - 1692°C.
shipbuilding steel plate Product Details
GB Grade AH 550 GB 712 Chemical element
For GB Grade AH 550 GB 712 datasheet and GB Grade AH 550 GB 712 chemical composition, please see the table below.
| Element | Min | Max | Similar |
|---|---|---|---|
| Si | - | 0.5500 | - |
| S | - | 0.0300 | - |
| P | - | 0.0300 | - |
| N | - | 0.0200 | - |
| Mn | - | 1.7000 | - |
| C | - | 0.2100 | - |
GB Grade AH 550 GB 712 Mechanical properties
Introduction of mechanical properties GB Grade AH 550 GB 712:
Yield point(σs)When the stress of GB Grade AH 550 GB 712 or specimen exceeds the elastic limit in tension, even if the stress does not increase, the GB Grade AH 550 GB 712 or specimen will continue to undergo obvious plastic deformation. This phenomenon is called yielding, and the minimum stress value when yielding occurs is called yield point.
Tensile Strength(σb) : The maximum stress of GB Grade AH 550 GB 712 during tension from the beginning to the time of fracture. It indicates the ability of GB Grade AH 550 GB 712 to resist fracture.
Elongation(δs) : The percentage of the plastic elongation length to the original sample length is called elongation.
Yield-strength ratio(σs/σb) : The ratio of yield point (yield strength) to tensile strength of GB Grade AH 550 GB 712 is called its yield strength ratio. The greater the yield-strength ratio, the higher the reliability of structural parts.
Hardness: Hardness is the ability of GB Grade AH 550 GB 712 to resist hard objects pressing into its surface. The higher the hardness, the better the wear resistance.
| 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) |
|---|---|---|---|---|---|---|
| 951 (≥) | 621 (≥) | 23 | 14 | 31 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 342 |
GB Grade AH 550 GB 712 Physical properties
The physical properties of GB Grade AH 550 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 |
|---|---|---|---|---|---|---|---|
| 33 | - | - | 0.41 | - | |||
| 177 | 522 | - | 44.3 | 441 | - | ||
| 977 | - | 21 | 32.2 | 211 | 343 |
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