GB Q345D GB/T 1591 steel
gb q345D GB/T steel Product Introduction
GB Q345D GB/T 1591 steel is a high performance low alloy steel developed by the Chinese steel industry. It is composed of manganese and silicon as the main alloying elements. This steel has a higher strength to weight ratio than many other conventioal steels, making it suitable for many applications, including construction, shipbuilding, railways, and wind power. Its wear and corrosion resistant properties also make it ideal for use in industrial and offshore applications. GB Q345D GB/T 1591 steel is widely used in China and is rapidly gaining popularity all over the world.
gB Q345D GB/T Steel Product Details
| Element | Min | Max | Similar |
|---|---|---|---|
| C | - | 0.1800 | - |
| Si | - | 0.5000 | - |
| Mn | - | 1.7000 | - |
| P | - | 0.0300 | - |
| S | - | 0.0250 | - |
| Nb | - | 0.0700 | - |
| V | - | 0.1500 | - |
| Ti | - | 0.2000 | - |
| Cr | - | 0.3000 | - |
| Ni | - | 0.5000 | - |
| Cu | - | 0.3000 | - |
| N | - | 0.0120 | - |
| Mo | - | 0.1000 | - |
| Als | 0.0150 | - | - |
| Ti | 0.0200 | 0.2000 | - |
| Al | 0.0150 | - | - |
| Nb | 0.0150 | 0.0600 | - |
| V | 0.0200 | 0.1500 | - |
| S | - | 0.0300 | - |
| Mn | 1.0000 | 1.6000 | - |
| Si | - | 0.5500 | - |
GB Q345D GB/T 1591 steel has a high tensile strength, typically ranging from 500MPa to 900MPa. The yield strength typically ranges from 300MPa to 600MPa. This steel also has a good impact toughness, typically ranging from 15J/cm2 to 20J/cm2. These properties make it suitable for use in load-bearing structures, such as bridges and buildings. This steel also has a high wear resistance, making it suitable for use in shipbuilding and other wear applications.
More detailed information about GB Q345D GB/T 1591 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) |
|---|---|---|---|---|---|---|
| 314 (≥) | 612 (≥) | 12 | 44 | 13 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 321 |
Physical properties of GB Q345D GB/T 1591 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 |
|---|---|---|---|---|---|---|---|
| 11 | - | - | 0.43 | - | |||
| 735 | 259 | - | 43.3 | 111 | - | ||
| 576 | - | 23 | 11.2 | 311 | 423 |
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