Austenitic stainless steel for stainless steel flanges
WC of austenitic stainless steel 0Cr19Ni9 steel made of stainless steel flange is less than 0.08%, and it is marked as "0" in the steel grade. This kind of stainless steel flange steel contains a lot of Ni and Cr, making the steel austenite at room temperature. This kind of steel has good plasticity, toughness, weldability, corrosion resistance and non-magnetic or weak magnetic properties. It has good corrosion resistance in oxidizing and reducing media. It is used to make acid resistant equipment, such as corrosion-resistant containers and equipment linings, transmission pipelines, nitric acid resistant equipment parts, etc. in addition, it can also be used as the main material of stainless steel watch accessories. Austenitic stainless steel made of stainless steel flange is generally treated by solid solution, that is, the steel is heated to 1050 ~ 1150 ℃, and then cooled by water or air to obtain single-phase austenitic structure.
AUSTENITIC FERRITIC duplex stainless steel for stainless steel flanges
Stainless steel flange material has the advantages of both austenitic and ferritic stainless steel, and has superplasticity. Austenitic and ferritic structures, each accounting for about half of the stainless steel flange material of stainless steel. When the carbon content of stainless steel flange material is low, the chromium (CR) content is 18% - 28%, and the nickel (Ni) content is 3% - 10%. Some stainless steel flange steels also contain Mo, Cu, Si, Nb, Ti, N and other alloy elements. This kind of stainless steel flange steel has the characteristics of both austenitic and ferritic stainless steel. Compared with ferrite, it has higher plasticity and toughness, no room temperature brittleness, significantly improved intergranular corrosion resistance and welding performance, while maintaining the 475 ℃ brittleness of ferritic stainless steel, high thermal conductivity and superplasticity.
