GB/T 1591 Q345E Introduce
The major advantages of GB/T 1591 are that it optimizes the classification of steel products, it simplifies the production and inspection process, and it ensures product quality. It also promotes the efficient use of resources and helps the industry reduce cost and waste. It enhances the consistency of the steel products and its fabrication processes, helping to improve overall competitiveness.
Smelting temperature:1578°C - 1314°C
Application:Low alloy high strength structural steel
GB/T 1591 Q345E Material Chemical Composition
The chemical composition of the GB/T 1591 Q345E steel are as follows:
| Element | Min | Max |
|---|---|---|
| Aluminum (Al) | 0.0150 | - |
| Molybdenum (Mo) | - | 0.1000 |
| Nitrogen (N) | - | 0.0120 |
| Copper (Cu) | - | 0.3000 |
| Nickel (Ni) | - | 0.5000 |
| Chromium (Cr) | - | 0.3000 |
| Titanium (Ti) | - | 0.2000 |
| Vanadium (V) | - | 0.1500 |
| Niobium (Nb) | - | 0.0700 |
| Sulfur (S) | - | 0.0200 |
| PhOsphorus (P) | - | 0.0250 |
| Manganese (Mn) | - | 1.7000 |
| Silicon (Si) | - | 0.5000 |
| Carbon (C) | - | 0.1800 |
GB/T 1591 Q345E Material Mechanical Properties
Toughness is another important property of GB/T 1591 Q345E steel. It is determined by the impact energy absorbed during fracture tests, using a Charpy, Izod or tension tests. Generally speaking, the lower the grade, the better the toughness.
The mechanical properties of the GB/T 1591 Q345E steel are as follows:
| YieldRp0.2 | ≤ 522 (MPa) |
| TeileRm | ≤ 133 (MPa) |
| ImpactKV/Ku | 31(J) |
| ElongationA | 31% |
| Reduction in cross section on fractureZ | 44% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 314 |
GB/T 1591 Q345E Material Thermal Properties
The thermal performance parameters of the GB/T 1591 Q345E steel are as follows:
| Temperature (°C) | 33 | 513 | 163 |
| Modulus of elasticity (GPa) | - | 779 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 14 |
| Thermal conductivity (W/m·°C) | - | 23.3 | 14.2 |
| Specific thermal capacity (J/kg·°C) | - | 343 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 342 |
| Poisson’s coefficient, ν | - | - | 224 |
GB/T 1591 Q345E Material Machining Technology
GB/T 1591 Q345E has a wide range of applications, including bridges, transport vehicles, buildings, machinery, pipelines, lifting and technical conveying facilities, heavy lifting and lifting equipment, etc., vehicles, container reinforcements, shipbuilding, construction, large-scale drilling platforms, and architectural structures, such as high-voltage transmission towers, steel structures. Grades such as materials are used.