GB/T 714 Q370qE Introduce
GB/T 714 Q370qE provides excellent toughness and strength for heavy-duty applications. It is easy to form and weld and can be welded by most conventional methods. GB/T 714 Q370qE is commonly used to make bridges, ships, tanks, and other structures. It is also used in the manufacture of crane booms, offshore platform structures and additional steel structures. The steel has a high strength-to-weight ratio, which makes it an excellent choice for these applications.
Smelting temperature:1147°C - 1691°C
Application:Structural steel for bridge
GB/T 714 Q370qE Material Chemical Composition
The chemical composition of the GB/T 714 Q370qE steel are as follows:
| Element | Min | Max |
|---|---|---|
| (Pcm) | - | 0.2000 |
| (CEV) | - | 0.4000 |
| (CEV) | - | 0.3800 |
| (CEV) | - | 0.4600 |
| (CEV) | - | 0.4400 |
| (Nb+V+Ti) | - | 0.2200 |
| Nitrogen (N) | - | 0.0080 |
| Copper (Cu) | - | 0.3000 |
| Nickel (Ni) | - | 0.3000 |
| Chromium (Cr) | - | 0.3000 |
| Aluminum (Al) | 0.0100 | 0.0450 |
| Titanium (Ti) | 0.0060 | 0.0300 |
| Vanadium (V) | 0.0100 | 0.0800 |
| Niobium (Nb) | 0.0100 | 0.0900 |
| Manganese (Mn) | 1.0000 | 1.6000 |
| Silicon (Si) | - | 0.5500 |
| Carbon (C) | - | 0.1400 |
| Hydrogen (H) | - | 0.0002 |
| Boron (B) | - | 0.0005 |
| Sulfur (S) | - | 0.0100 |
| PhOsphorus (P) | - | 0.0200 |
| (Nb+V+Ti) | - | 0.2200 |
| Nitrogen (N) | - | 0.0080 |
| Copper (Cu) | - | 0.3000 |
| Nickel (Ni) | - | 0.3000 |
| Chromium (Cr) | - | 0.3000 |
| Aluminum (Al) | 0.0100 | 0.0450 |
| Titanium (Ti) | 0.0060 | 0.0300 |
| Vanadium (V) | 0.0100 | 0.0800 |
| Niobium (Nb) | 0.0050 | 0.0600 |
| Manganese (Mn) | 1.0000 | 1.6000 |
| Silicon (Si) | - | 0.5500 |
| Carbon (C) | - | 0.1800 |
| Sulfur (S) | - | 0.0150 |
| Manganese (Mn) | 1.2000 | 1.6000 |
| Silicon (Si) | - | 0.5000 |
| Carbon (C) | - | 0.1700 |
| Vanadium (V) | - | 0.0800 |
| Titanium (Ti) | - | 0.0300 |
| Silicon (Si) | - | 0.5500 |
| Nickel (Ni) | - | 0.5000 |
| Niobium (Nb) | - | 0.0600 |
| Nitrogen (N) | - | 0.0120 |
| Molybdenum (Mo) | - | 0.2000 |
| Manganese (Mn) | 1.0000 | 1.7000 |
| Copper (Cu) | - | 0.5500 |
| Chromium (Cr) | - | 0.8000 |
| Carbon (C) | - | 0.1800 |
| Boron (B) | - | 0.0040 |
| Aluminum (Al) | 0.0150 | - |
GB/T 714 Q370qE Material Mechanical Properties
The mechanical properties of the GB/T 714 Q370qE steel are as follows:
| YieldRp0.2 | ≤ 664 (MPa) |
| TeileRm | ≤ 752 (MPa) |
| ImpactKV/Ku | 44(J) |
| ElongationA | 34% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 311 |
GB/T 714 Q370qE Material Thermal Properties
The thermal performance parameters of the GB/T 714 Q370qE steel are as follows:
| Temperature (°C) | 34 | 766 | 258 |
| Modulus of elasticity (GPa) | - | 152 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 44 |
| Thermal conductivity (W/m·°C) | - | 23.3 | 12.2 |
| Specific thermal capacity (J/kg·°C) | - | 412 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 413 |
| Poisson’s coefficient, ν | - | - | 412 |