3 16 stainless steel is mainly used for pulping and papermaking equipment, heat exchangers, dyeing equipment, film processing equipment, pipelines and materials outside buildings in coastal areas. 20 13 is also used in the field of electromagnetic valves, mainly used in housings, fixtures, spheres, valve bodies, valve seats, nuts, valve stems and so on.
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Stainless steel is generally the floorboard of stainless steel and acid-resistant steel. Stainless steel refers to steel that can resist the corrosion of weak media such as atmosphere, steam and water, and acid-resistant steel refers to steel that can resist the corrosion of chemical corrosive media such as acid, alkali and salt. ?
Stainless steel came out at the beginning of the 20th century, with a history of more than 20 19 years. The invention of stainless steel is a great achievement in the world metallurgical history. 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 with different properties, and several categories have gradually formed in the development process.
According to the structure, it can be divided into martensite stainless steel (including precipitation hardening stainless steel), ferrite stainless steel, austenite stainless steel and austenite plus ferrite duplex stainless steel. According to the main chemical composition of steel or some characteristic elements in steel, it can be divided into chromium stainless steel, chromium nickel stainless steel, chromium nickel molybdenum stainless steel, low carbon stainless steel, high molybdenum stainless steel and high purity stainless steel.
According to the properties and uses of steel, it can be divided into nitric acid-resistant stainless steel, sulfuric acid-resistant stainless steel, pitting corrosion-resistant stainless steel, stress corrosion-resistant stainless steel and high-strength stainless steel. According to the functional characteristics of steel, it can be divided into low-temperature stainless steel, nonmagnetic stainless steel, free-cutting stainless steel and superplastic stainless steel. The common classification method of 20 13 is based on the characteristics and chemical composition of steel structures, as well as their combination. Generally, it can be divided into martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, duplex stainless steel and precipitation hardening stainless steel, and can also be divided into chromium stainless steel and nickel stainless steel.
Stainless steel is generally used in corrosive environments, as well as medical devices and daily necessities.
Baidu encyclopedia -3 16 stainless steel