GB Grade FH 620 GB 712
shipbuilding steel plate Product Introduction
GB Grade FH 620 GB 712 is one of the world's most popular and versatile steel grade. It is used in a wide range of applications, from bridge building and other large structures, to vehicle parts, industrial machinery, and shipbuilding. It has excellent properties, including good strength, toughness, heat resistance, and machinability. Therefore, it is an excellent choice for a wide variety of projects and applications.
GB Grade FH 620 GB 712 is one of the main products of our company. Other than offer high quality Grade FH 620 with competitive price, we also help to resolve all kinds of doubts of clients. Such as Grade FH 620 chemical composition, Grade FH 620 properties,Grade FH 620 yield strength, Grade FH 620 tensile strength, Grade FH 620 equivalent grades, etc. Meanwhile, we also do procesing for GB Grade FH 620 GB 712, including cutting, bending, welding, drilling, etc.
Application: Structural steel for ships and marine engineering.
Heat treated: 1755°C - 1654°C.
shipbuilding steel plate Product Details
GB Grade FH 620 GB 712 Chemical element
GB Grade FH 620 GB 712 is hot selling products of our company. Our GB Grade FH 620 GB 712 chemical composition is controlled strictly with stipulation of standard GB 712.
Meanwhile, our advanced GB Grade FH 620 GB 712 production line strives to control impurities to the minimum, so as to make GB Grade FH 620 GB 712 play its best performance. Below is the proportion of main elements in GB Grade FH 620 GB 712:
| Element | Min | Max | Similar |
|---|---|---|---|
| Si | - | 0.5500 | - |
| S | - | 0.0200 | - |
| P | - | 0.0200 | - |
| N | - | 0.0200 | - |
| Mn | - | 1.6000 | - |
| C | - | 0.1800 | - |
GB Grade FH 620 GB 712 Mechanical properties
Introduction of mechanical properties GB Grade FH 620 GB 712:
Yield point(σs)When the stress of GB Grade FH 620 GB 712 or specimen exceeds the elastic limit in tension, even if the stress does not increase, the GB Grade FH 620 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 FH 620 GB 712 during tension from the beginning to the time of fracture. It indicates the ability of GB Grade FH 620 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 FH 620 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 FH 620 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) |
|---|---|---|---|---|---|---|
| 617 (≥) | 227 (≥) | 11 | 22 | 11 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 441 |
GB Grade FH 620 GB 712 Physical properties
Basic Physical Properties of GB Grade FH 620 GB 712 Steel
| 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 | - | - | 0.34 | - | |||
| 211 | 178 | - | 23.3 | 221 | - | ||
| 893 | - | 23 | 43.2 | 424 | 324 |
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