The difference between chromium steel and stainless steel? What is each suitable for?

Stainless steel is generally stainless steel and acid - resistant steel. Stainless steel refers to atmospheric, steam and water and other weak medium corrosion of steel, and acid resistant steel refers to acid, alkali, salt and other chemical corrosion medium corrosion of steel. Stainless steel since the beginning of this century, to now has a history of more than 90 years. The invention of stainless steel is a major achievement in the history of world metallurgy. The development of stainless steel has laid an important material and technical foundation for the development of modern industry and scientific and technological progress. There are many kinds of stainless steel, different performance, it gradually formed several categories in the process of development. According to the structure, it is divided into martensitic stainless steel (including precipitate hardened stainless steel), ferritic stainless steel, austenitic stainless steel and austenitic ferrite duplex stainless steel and other four categories; According to the main chemical composition of steel or some characteristic elements in the steel to classify, divided into chromium stainless steel, chromium nickel stainless steel, chromium nickel molybdenum stainless steel and low carbon stainless steel, high molybdenum stainless steel, high purity stainless steel; According to the performance characteristics and use of steel classification, is divided into nitric acid resistance stainless steel, sulfuric acid resistance stainless steel, pitting corrosion resistance stainless steel, stress corrosion resistance stainless steel, high strength stainless steel; According to the functional characteristics of steel classification, it is divided into low temperature stainless steel, non-magnetic stainless steel, free cutting stainless steel, super plastic stainless steel. At present, the commonly used classification methods are based on the characteristics of steel structure and chemical composition and the combination of the two methods. Generally divided into martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, duplex stainless steel and precipitation hardening stainless steel, or divided into chromium stainless steel and nickel stainless steel two categories.

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