GB/T 16270 Q500E Introduce
High strength quenched and tempered steel plates, in compliance with GB/T 16270, represent the advanced level in producing steel plates in China. High-strength quenched and tempered steel plate refers to advanced steel plate production process and high-strength performance. The main application of GB/T 16270-2009 steel plates are in nuclear power, offshore engineering and other high-risk areas.
Smelting temperature:1366°C - 1492°C
Application:Quenched and tempered steel plate for high strength structure
GB/T 16270 Q500E Material Chemical Composition
The chemical composition of the GB/T 16270 Q500E steel are as follows:
| Element | Min | Max |
|---|---|---|
| Aluminum (Al) | 0.0150 | - |
| Boron (B) | - | 0.0040 |
| Molybdenum (Mo) | - | 0.2000 |
| Nitrogen (N) | - | 0.0150 |
| Copper (Cu) | - | 0.5500 |
| Nickel (Ni) | - | 0.8000 |
| Chromium (Cr) | - | 0.6000 |
| Titanium (Ti) | - | 0.2000 |
| Vanadium (V) | - | 0.1200 |
| Niobium (Nb) | - | 0.1100 |
| Sulfur (S) | - | 0.0200 |
| PhOsphorus (P) | - | 0.0250 |
| Manganese (Mn) | - | 1.8000 |
| Silicon (Si) | - | 0.6000 |
| Carbon (C) | - | 0.1800 |
GB/T 16270 Q500E Material Mechanical Properties
The mechanical properties of the GB/T 16270 Q500E steel are as follows:
| YieldRp0.2 | ≤ 332 (MPa) |
| TeileRm | ≤ 677 (MPa) |
| ImpactKV/Ku | 14(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 344 |
GB/T 16270 Q500E Material Thermal Properties
The thermal performance parameters of the GB/T 16270 Q500E steel are as follows:
| Temperature (°C) | 23 | 253 | 793 |
| Modulus of elasticity (GPa) | - | 648 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 23.2 |
| Specific thermal capacity (J/kg·°C) | - | 141 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.23 | - | - |
| Deity (kg/dm³) | - | - | 111 |
| Poisson’s coefficient, ν | - | - | 433 |
GB/T 16270 Q500E Material Machining Technology
GB/T 16270 Q500E steel is a popular structural steel used in machine components and structures in China. It has high tensile strength, good toughness, and excellent weldability, making it an ideal choice for the production of machine components. The steel is difficult to machine due to its hardness, but the use of suitable tools, coolants, and lubricants can improve the machinability of the steel. The recommended machining processes for GB/T 16270 Q500E steel include turning, drilling, sawing, milling, and grinding, while high-speed steel, cobalt, and tungsten carbide tools are recommended for optimal results.