Duplex stainless steel variety is a high chromium stainless steel with low nickel species, not only has good toughness and weldability, and high yield strength and resistance to chloride stress corrosion.
At present, the use of duplex stainless steel variety is the largest, SAF2205 (22% Cr-5% Ni-3% Mo-0.15% nitrogen). The direction of development of duplex stainless steel variety is to reduce the nickel, to increase manganese, nitrogen content. The second generation of representative species of duplex stainless steel model is developed developed LDX2101 (21.5% Cr-5% Mn-1.5% Ni-0.22% nitrogen), and its corrosion resistance and Type 316 stainless steel Model considerable, and its strength is 304 stainless steel models twice, the mechanical properties of stainless steel models with the 2205's, its future applications are: a bridge structure, , containers, train structure and water heaters.