GB/T 3077 20CrNi3 Introduce
GB/T 3077 20CrNi3 steel is a versatile material that is ideal for a variety of engineering and automotive applications. Its high strength and ductility allow it to endure heavy loads and stress, while its impact resistance and fatigue resistance make it suitable for use in parts and components that are subject to frequent vibration or impacts. GB/T 3077 20CrNi3 steel is highly economical. It has good weldability and is easy to shape and form, which make it cost-effective to produce. It is also resistant to corrosion and is available in a variety of grades, making it a versatile and reliable material for a wide range of applications.
Smelting temperature:1356°C - 1116°C
Application:Alloy structural steel
GB/T 3077 20CrNi3 Material Mechanical Properties
The mechanical properties of GB/T 3077 20CrNi3 steel, hardness, impact resistance, and fatigue resistance.
Hardness: GB/T 3077 20CrNi3 steel has a high hardness level, with a maximum hardness of up to HRC 58. This makes it resistant to wear and tear, and ideal for applications such as military vehicles and sheet metal components that require superior wear and abrasion resistance.
Impact resistance: GB/T 3077 20CrNi3 steel is highly resistant to impacts caused by vibrations, temperature extremes, and impacts from dropping heavy objects. This makes it well suited for applications such as auto parts and construction components, which must be able to withstand frequent vibration or impacts without breaking or deforming.
Fatigue resistance: GB/T 3077 20CrNi3 steel is resistant to fatigue due to its high strength-to-weight ratio. This means it can be used in applications where the steel must be able to withstand repeated cycles of loading and unloading without breaking or deforming.
The mechanical properties of the GB/T 3077 20CrNi3 steel are as follows:
| YieldRp0.2 | ≤ 151 (MPa) |
| TeileRm | ≤ 385 (MPa) |
| ImpactKV/Ku | 32(J) |
| ElongationA | 11% |
| Reduction in cross section on fractureZ | 31% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 433 |
GB/T 3077 20CrNi3 Material Thermal Properties
The thermal performance parameters of the GB/T 3077 20CrNi3 steel are as follows:
| Temperature (°C) | 14 | 455 | 447 |
| Modulus of elasticity (GPa) | - | 285 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 334 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.13 | - | - |
| Deity (kg/dm³) | - | - | 232 |
| Poisson’s coefficient, ν | - | - | 413 |
GB/T 3077 20CrNi3 Material Machining Technology
When performing machining operations on GB/T 3077 20CrNi3 steel, it is important to use the correct cutting speed and feed rates. The cutting speed should be adjusted based on the size and shape of the workpiece, as well as the hardness and strength of the steel. It is also important to use the proper cutting tools and lubricants to ensure the best results. Using the wrong cutting tools or failing to use adequate lubrication can lead to poor surface finish, overheating, and other issues.