Chemical properties of Q345GNH weathering steel plate
Q345GNH weathering steel plate is a high-strength low-alloy structural steel with good welding performance, low-temperature toughness and atmospheric corrosion resistance.
Q345GNH weathering plate is widely used in welded structures such as buildings, bridges, towers, cranes, ships, pressure vessels, as well as structural parts that require corrosion protection such as highway facilities and outdoor facilities.
Q345GNH Atmospheric Corrosion Steel Plate Chemical element
| Element | Min | Max | Similar |
|---|---|---|---|
| Ti | - | 0.0300 | - |
| Si | 0.2000 | 0.6000 | - |
| S | - | 0.0350 | - |
| RE | - | 0.1500 | - |
| P | 0.0700 | 0.1200 | - |
| Mn | 0.5000 | 0.9000 | - |
| Cu | 0.2500 | 0.5000 | - |
| C | - | 0.1200 | - |
Q345GNH Corrosion Resistant Steel Plate Mechanical properties
| 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) |
|---|---|---|---|---|---|---|
| 462 (≥) | 223 (≥) | 32 | 43 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 313 |
Q345GNH Atmospheric Corrosion Resisting Structural Steel Physical properties
| 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 | - | - | 0.22 | - | |||
| 375 | 361 | - | 14.3 | 244 | - | ||
| 919 | - | 41 | 31.2 | 422 | 132 |
