GB/T 1299 T20432 Introduce
Chromium, copper, nickel, and molybdenum are present in GB/T 1299 T20432 steel as trace elements. These elements generally contribute to either corrosion resistance, heat resistance, or improved toughness. Chromium helps resist corrosion, copper aids in heat resistance, nickel increases strength and toughness, and molybdenum improves stress corrosion resistance.
Smelting temperature:1581°C - 1328°C
Application:Alloy tool steel
GB/T 1299 T20432 Material Chemical Composition
The chemical composition of the GB/T 1299 T20432 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Tungsten (W) | 2.5000 | 3.5000 |
| Vanadium (V) | 0.8000 | 1.2000 |
| Silicon (Si) | - | 0.4000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0300 |
| Nickel (Ni) | - | 0.2000 |
| Niobium (Nb) | 0.2000 | 0.3500 |
| Molybdenum (Mo) | 1.8000 | 2.5000 |
| Manganese (Mn) | - | 0.4000 |
| Copper (Cu) | - | 0.3000 |
| Chromium (Cr) | 3.8000 | 4.4000 |
| Carbon (C) | 0.6000 | 0.7000 |
GB/T 1299 T20432 Material Mechanical Properties
GB/T 1299 T20432 steel is an extremely versatile material due to its excellent combination of mechanical and physical properties. It has a yield strength of 390-600 MPa and tensile strength of 540-780 MPa, making it exceptionally strong and durable. It is highly resistant to deformation, offers good weldability, and is widely used in the automotive, energy and shipbuilding industry. Moreover, it is ideal for use in bridge, high-rise buildings, and structures subject to constant stress in the construction industry.
The mechanical properties of the GB/T 1299 T20432 steel are as follows:
| YieldRp0.2 | ≤ 854 (MPa) |
| TeileRm | ≤ 175 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 33% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 431 |
GB/T 1299 T20432 Material Thermal Properties
The thermal performance parameters of the GB/T 1299 T20432 steel are as follows:
| Temperature (°C) | 23 | 927 | 734 |
| Modulus of elasticity (GPa) | - | 152 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 23.3 | 14.2 |
| Specific thermal capacity (J/kg·°C) | - | 224 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 442 |
| Poisson’s coefficient, ν | - | - | 311 |