Composition of austenitic stainless steel elbow

Austenitic stainless steel elbow is a stainless steel with austenite and ferrite structure each accounting for about half. In the case of low C content, the Cr content is 18% to 28%, and the Ni content is 3% to 10%. Some steels also contain alloying elements such as Mo, Cu, Si, Nb, Ti, and N. This type of steel has the characteristics of austenitic and ferritic stainless steel. Compared with ferrite, it has higher plasticity and toughness, no room temperature brittleness, and significantly improved intergranular corrosion resistance and welding performance, while still maintaining iron The 475℃ brittleness, high thermal conductivity and superplasticity of the element stainless steel. Austenitic stainless steel elbows mainly have the following important developments: 1) adding Mo to improve pitting corrosion and crevice corrosion resistance; 2) reducing C or adding Ti and Nb to reduce the tendency of intergranular corrosion; 3) adding Ni and Cr to improve high temperature resistance Oxidation and strength 4) Add Ni to improve stress corrosion resistance 5) Add S and Se to improve machinability and surface accuracy of components