20CrMo alloy structural steel

20CrMo Alloy Structure Steel

20CrMo alloy structure steel is a commonly used alloy structural steel material in China. It has good comprehensive mechanical properties after heat treatment (quenching and tempering) and has good hardenability and machinability. The material number of 20CrMo is 1.7321, which is equivalent to AISI 4130 and DIN 25CrMo4.

20CrMo alloy structural steel is widely used in the manufacture of various mechanical parts and components, such as turbine blades, compressor blades, vehicle and ship transmission parts, engine parts, fasteners, etc. It is also used for cold plastic deformation of medium and thick steel plates, thin steel plates and strips, which can be used for manufacturing parts requiring good comprehensive mechanical properties, such as gears, shafts, bolts, nuts, etc.

20CrMo alloy structure steel has high hardenability and good wear resistance. After quenching, the surface hardness can reach HRC60-63, while the surface wear resistance can reach HRC20-30. 20CrMo also has good strength and toughness, as well as excellent cold and hot processing properties, so the material can be conveniently processed into various parts under the right processing technology.

20CrMo alloy structure steel has good fatigue resistance and fracture toughness, which makes it an ideal material for the manufacture of various machine parts and components. Its excellent low-temperature impact resistance makes it a good choice for components and parts used in low-temperature environments, as well as areas subject to vibration and impact loads. In addition, the carburizing resistance of 20CrMo alloy structure steel is also good, which can increase the surface hardness and wear resistance of the parts.

In summary, 20CrMo alloy structure steel is a commonly used alloy structural steel material with good comprehensive mechanical properties. It has a wide range of applications, such as for the manufacture of turbine blades, compressor blades, engine parts, gears, shafts, bolts, nuts and other parts. It has good strength, fatigue resistance, fracture toughness and low-temperature impact resistance, so it is suitable for various manufacturing parts.

20CrMo Alloy Structural Steel

20CrMo alloy structural steel is a low-carbon (0.17-0.37%), low alloyed (Cr 0.20-0.30%, Mo 0.15-0.25%) high strength steel. It is used for manufacturing various important parts of various machines and tools which require good comprehensive mechanical properties and high strength and toughness, such as heavy working units, fasteners and transmission parts.

The chemical composition of 20CrMo alloy structural steel are as follows: C: 0.17-0.37, Si: 0.17-0.37, Mn: 0.35-0.65, Cr: 0.20-0.30, Mo: 0.15-0.25, P: ≤ 0.035, S: ≤ 0.035. After this, the steel can be heat treated in the following ways: quenching, tempering and annealing, etc.

The mechanical properties of 20CrMo alloy structural steel are as follows: Tensile strength: more than 580MPa, yield strength: more than 420MPa, elongation after fracture: more than 15%. The physical properties are as follows: Density: 7.8 g/cm3, specific heat (20°C): 0.48KJ/Kg°C, electrical resistivity: 0.146μΩ.m (20°C), thermal conductivity (20°C): 11.84W/m·K.

As a medium carbon, low alloy steel, 20CrMo alloy structural steel has excellent mechanical properties, good hardenability and good thermal conductivity. It can be used to make components which require high strength and good toughness. Furthermore, 20CrMo alloy steel can also be used to manufacture cold forming and welding products.