GB/T 1299 9Cr5NiMoV Introduce
Chromium, copper, nickel, and molybdenum are present in GB/T 1299 9Cr5NiMoV 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:1894°C - 1456°C
Application:Alloy tool steel
GB/T 1299 9Cr5NiMoV Material Chemical Composition
The chemical composition of the GB/T 1299 9Cr5NiMoV steel are as follows:
| Element | Min | Max |
|---|---|---|
| Vanadium (V) | 0.1000 | 0.2000 |
| Nickel (Ni) | 0.3000 | 0.5000 |
| Molybdenum (Mo) | 0.2000 | 0.4000 |
| Chromium (Cr) | 4.8000 | 5.2000 |
| Sulfur (S) | - | 0.0150 |
| PhOsphorus (P) | - | 0.0200 |
| Manganese (Mn) | 0.2000 | 0.5000 |
| Silicon (Si) | 0.5000 | 0.8000 |
| Carbon (C) | 0.8200 | 0.9000 |
GB/T 1299 9Cr5NiMoV Material Mechanical Properties
GB/T 1299 9Cr5NiMoV steel is used in almost every branch of industry due to its unique combination of mechanical and physical properties. GB/T 1299 9Cr5NiMoV Grade steel is one such variety that is used particularly in the construction industry. It has excellent mechanical properties, such as high strength and ductility, and can be used in a wide variety of applications.
The mechanical properties of the GB/T 1299 9Cr5NiMoV steel are as follows:
| YieldRp0.2 | ≤ 124 (MPa) |
| TeileRm | ≤ 349 (MPa) |
| ImpactKV/Ku | 42(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) | 331 |
GB/T 1299 9Cr5NiMoV Material Thermal Properties
The thermal performance parameters of the GB/T 1299 9Cr5NiMoV steel are as follows:
| Temperature (°C) | 11 | 897 | 797 |
| Modulus of elasticity (GPa) | - | 864 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 31 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 32.2 |
| Specific thermal capacity (J/kg·°C) | - | 321 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.11 | - | - |
| Deity (kg/dm³) | - | - | 312 |
| Poisson’s coefficient, ν | - | - | 124 |