GB/T 3077 30Cr2Ni4Mo Introduce
GB/T 3077 30Cr2Ni4Mo steel is a versatile material that is used in the construction of bridges, vessels, chemical tanks and other structures that must be able to withstand extreme conditions. Its set of unique chemical properties, such as high tensile strength, excellent ductility, heat resistance, corrosion resistance, weldability and machinability make it the perfect choice for a wide range of demanding applications.
Smelting temperature:1655°C - 1376°C
Application:Alloy structural steel
GB/T 3077 30Cr2Ni4Mo Material Chemical Composition
The chemical composition of the GB/T 3077 30Cr2Ni4Mo steel are as follows:
| Element | Min | Max |
|---|---|---|
| Nickel (Ni) | 3.3000 | 4.3000 |
| Molybdenum (Mo) | 0.3000 | 0.6000 |
| Chromium (Cr) | 1.2000 | 1.5000 |
| Manganese (Mn) | 0.5000 | 0.8000 |
| Silicon (Si) | 0.1700 | 0.3700 |
| Carbon (C) | 0.2600 | 0.3300 |
GB/T 3077 30Cr2Ni4Mo Material Mechanical Properties
GB/T 3077 30Cr2Ni4Mo is mostly used for engineering, industrial and transportation applications that require high strength, corrosion resistance, superior performance, and long service life. GB/T 3077 30Cr2Ni4Mo meets the demands of the most stringent applications with its good machinability, low cost, good formability and high strength-to-weight ratio. It is the perfect choice for automotive, aerospace, and other lightweight applications.
The mechanical properties of the GB/T 3077 30Cr2Ni4Mo steel are as follows:
| YieldRp0.2 | ≤ 293 (MPa) |
| TeileRm | ≤ 729 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 34% |
| Reduction in cross section on fractureZ | 42% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 112 |
GB/T 3077 30Cr2Ni4Mo Material Thermal Properties
The thermal performance parameters of the GB/T 3077 30Cr2Ni4Mo steel are as follows:
| Temperature (°C) | 41 | 499 | 884 |
| Modulus of elasticity (GPa) | - | 236 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 341 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 231 |
| Poisson’s coefficient, ν | - | - | 121 |
GB/T 3077 30Cr2Ni4Mo Material Machining Technology
GB/T 3077 30Cr2Ni4Mo is an excellent choice for creating components and parts that require high strength, superior performance, and long service life. This steel offers a good combination of mechanical and physical properties with excellent weldability and machinability, especially when compared to other Chinese structural steels. With its cost and performance advantages, GB/T 3077 30Cr2Ni4Mo makes an ideal choice for a wide range of applications.