20Mn2 Alloy Structure Steel
20Mn2 alloy structure steel is a kind of low carbon, high strength, high hardness, low alloy steel material. With high yield strength and excellent weldability, this material is often used in structures of transverse and longitudinal joints, winding wires and welding structures. This kind of steel is also widely used in oil and gas industry as pressure vessels and pipeline.
20Mn2 alloy structure steel contains a relatively large amount of carbon and manganese. Its chemical composition consists of 0.17-0.23% carbon, 1.4-1.7% manganese, 0.035% phosphorus, 0.035% sulfur, 0.20-0.30% silicon and other minor alloy elements. Compared to other common low carbon steels like AISI 1010 or SAE 1020, the manganese content of 20Mn2 is higher, thus giving it both higher strength and hardness, as well as an increased wear and tear resistance. In addition to strong mechanical properties, 20Mn2 also features good cold deformation and good weldability.
Due to its versatility and versatility in a wide range of applications, 20Mn2 alloy structure steels are used in a variety of industries including aerospace, automotive, construction, shipping and agriculture. In the automobile industry, it is used in suspension systems, axles, shafts and frames. It is also used in agricultural equipment for farming, harvesting, sowing and threshing. For example, 20Mn2 is often used in the production of ploughshares and hoes. In addition, this alloy is often used in engineering structures such as bridges, buildings and railings.
The yield strength of 20Mn2 isup to 350MPa and its tensile strength is around 565MPa, which is 30-45% higher than that of the other common low carbon steel like AISI 1010 and SAE 1020. Compared with other low alloy steels like SAE 1141 and SAE 4130, the high manganese content of 20Mn2 steel also offers a notable wear and tear resistance. Thanks to its high content of manganese, this steel is also very resistant against shocks, scratches and cracking.
20Mn2 alloy structure steels canalso be heat treated, in order to further improve their mechanical properties. The typical heat treatment process includes normalizing, annealing and tempering. Normalizing increases the strength, hardness and wear resistance of the steel while annealing improves its ductility and toughness. Tempering reduces stress and increases machinability. Other non-standard heat treatment processes such as quenching and quenching in oil are also possible.
Overall, 20Mn2 alloy structure steel is an excellent material for a wide range of applications. It offers a high yield strength, good ductility and toughness, good weldability and machinability, and good wear and tear resistance. With proper heat treatment, this material can be used to make components, parts and tools for various industries, from construction to aerospace and automotive.
