430 stainless steel sheets corrosion-resistant steel

Chromium content of less than 12 % of the corrosion-resistant steel , acid-resistant stainless steel is short . Chromium steel corrosion medium and the role of oxygen in the steel surface to form a thin oxide film , called self- passivation film , the steel in the air, water and acid, alkali, salt is very resistant to corrosion. Other than chromium steel , qiyi stainless steel sheets nickel, molybdenum, copper , titanium and other alloy elements , it has better corrosion resistance , mechanical properties or the like process . Chromium stainless chromium content between 12 to 30 %. Was first made ​​in 1912 by the British H. Brearley . By organizational structures at room temperature, chromium stainless steel is divided into ferritic stainless and martensitic stainless steel categories. Ferritic stainless steel low carbon content , heat treatment can enhance low intensity , qiyi 430 stainless steel sheets  such as 0Cr13, 0Cr17Ni , mainly used for the production of nitric acid , synthetic fibers and food industry equipment. Carbon , total nitrogen content of 0.02 % or less of the ultra- pure ferritic stainless steel as 00Cr27Mo better corrosion resistance and process performance. Martensitic stainless steel high carbon content , after hardening heat treatment to get high strength and hardness, but poor corrosion resistance , such as 1Cr13, 4Cr13, 9Cr18MoV steel , used for the manufacture of turbine blades to withstand high loads , the bolt and high hardness of valves, tools and bearings.