Ferritic stainless steel

Stainless steel with ferrite structure in use. Chromium content of 11% to 30%, with body-centered cubic crystal structure. This type of steel is generally nickel-free, and sometimes contains a small amount of elements such as Mo, Ti, and Nb. This type of steel has large thermal conductivity, small expansion coefficient, good oxidation resistance, and excellent resistance to stress corrosion, etc. , steam, water and oxidizing acid corrosion parts. Such steels have the disadvantages of poor plasticity, significantly reduced post-weld plasticity and corrosion resistance, which limits their application. The application of off-furnace refining technology (AOD or VOD) can greatly reduce the gap elements such as carbon, nitrogen, etc., thus making this type of steel widely used.