20mn2 has medium strength, high plasticity during cold deformation, good low temperature performance, super weldability and machinability. Compared to carbon steel, it has higher hardenability. This type of steel has a high tensile strength due to its suitable hardenability. Class 80 lifting chains are usually made of alloy steel of this material, and G100 class chains will use 20MNV.
20mn2 Chemical Composition:
Mechanical Properties:
Features and scope of application: High manganese low carbon permeable steel, similar to 15mn steel. Contains manganese (W mn 0.).70%-1.00% higher low-carbon carburizing steel, due to high manganese, its strength plasticity, machinability and hardenability are slightly higher than 15 manganese steel, carburizing and quenching surface formation of soft spots, carburizing is suitable for carburizing. Carbonitriding treatment obtains the comprehensive properties of surface wear resistance and good core toughness.
Good toughness after hot-rolled or normalizing treatment. It is suitable for gears, crank shafts, brackets, chains, screws, nuts, riveting and welding structural parts, plates for the manufacture of oil tanks, etc.
This 20mn2 material will be made into wire rod, which is also a step in the production of the chain, the raw material diameter and hardness are tested, and then put into the production line after passing the qualification.