With chromium 12% to 30%. Its corrosion resistance, toughness and can increase the welding with chromium content increasing, resistance to chloride stress corrosion is superior to other types of stainless steel, which belongs to this category are Crl7, Cr17Mo2Ti, Cr25, Cr25Mo3Ti, Cr28 etc.. Ferritic stainless steel for high chromium content, corrosion resistant properties and oxidation resistance are better, but the mechanical properties and process performance is poor, much less force for the acid structure and antioxidation steel. This kind of steel can resist the corrosive atmosphere, nitric acid and saline solution, and has high antioxidant performance, coefficient of thermal expansion for small, nitric acid and food factory equipment, can also be produced under high temperature parts, such as gas turbine parts etc..
