Do you know the abbreviation of duplex stainless steel? Duplex Stainless Steel is DSS (Duplex Stainless Steel) . AUSTENITE + ferrite duplex stainless steel is a kind of stainless steel which has both austenite and ferrite structure, and the two-phase structure should exist independently, and the content of the two-phase is larger, the content of the least phase should be more than 15% . However, the AUSTENITIC + ferritic duplex stainless steel (commonly known as α + γ duplex stainless steel or duplex stainless steel) used in practical engineering is based on austenite and contains not less than 30% ferrite, the most common is the duplex stainless steel with about 50% of each phase. Due to its Α + γ dual phase structure, dual phase stainless steel has the characteristics of both Austenitic stainless steel and ferritic stainless steel. Compared with ferritic stainless steel, α + γ duplex stainless steel has higher toughness and lower brittle transition temperature. The intergranular corrosion resistance and weldability are improved obviously, while some characteristics of ferritic stainless steel such as 4750C Brittleness, high thermal conductivity, low linear expansion coefficient, superplasticity and magnetism are retained. Compared with Austenitic stainless steel stainless steel, α + γ duplex stainless steel has higher strength, especially higher yield strength, and better intergranular corrosion resistance, stress corrosion resistance and corrosion fatigue resistance. It is well known that stainless steel is mostly used outside of buildings, so corrosion resistance is particularly important. Class 2205 duplex stainless steels are particularly prominent in stainless steels, consisting of 22% chromium and 5% nickel. This type of steel features: Good Strength [ far better than 304] corrosion resistance is also good, it is often used in the petrochemical industry pipelines, pressure vessels and mandrels. Everyone in the selection of stainless steel also according to different applications corresponding to different models of stainless steel.