The Short Introduction of Austenitic-Ferritic Duplex Stainless Steel

Austenitic-ferritic duplex stainless steel combines the advantages of austenitic and ferritic stainless steels with superplasticity. Austenitic and ferrite structures each account for about half of the stainless steel. In the case of a lower C content, the Cr content is between 18% and 28%, and the Ni content is between 3% and 10%. Some steels also contain alloying elements such as Mo, Cu, Si, Nb, Ti, and N. Austenitic-ferritic duplex stainless steels are characterized by austenitic and ferritic stainless steels. Its plasticity, toughness, no room temperature brittleness, resistance to intergranular corrosion and welding performance are significantly improved. At the same time, it also maintains 475°C brittleness and high thermal conductivity of ferritic stainless steel, which is characterized by superplasticity. Compared with austenitic stainless steel, it has high strength and resistance to intergranular corrosion and chloride stress corrosion resistance. Duplex stainless steel has excellent pitting resistance and is also a nickel-saving stainless steel.