20Mn2 is an alloy structural steel with moderate strength, high plasticity during cold deformation, good low temperature performance, weldability and machinability, etc., Carbon C: 0.17~0.24 Si: 0.17~0.37 Manganese Mn:1.40~1.80 Phosphorus P: ≤0.025 sulfur S: ≤0.025 Chromium Cr: ≤0.30 Ni: ≤0.30 Cu: ≤0.25.

What are the applications of this steel?

Compared with carbon steel, its hardenability is higher, in the oil critical quench diameter up to 4 ~ 15 mm, after the appropriate metal heat treatment, the microstructure is uniform sostensite, bainite or very fine pearlite, so it has a high tensile strength. Used to manufacture the surface and the core of the parts are not high requirements, such as cars, tractors and machine tools instead of 20Cr steel production of carburizing pinion, shaft, but also can be used to manufacture riveted welding parts and screws, nuts, etc.