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About stainless steel

May 18, 2018

Stainless steel is an abbreviation for stainless acid resistant steel. It is resistant to air, steam, water and other weakly corrosive media or stainless steel. It is called stainless steel; it will be chemically resistant to chemicals (acid, alkali, salt, etc. Corrosion of the steel is called acid-resistant steel.

Because of the difference in chemical composition between the two, their corrosion resistance is different. Ordinary stainless steel is generally not resistant to chemical media corrosion, and acid-resistant steel is generally non-rust. The term “stainless steel” refers not only to stainless steel but to more than one hundred industrial stainless steels. Each type of stainless steel developed has good performance in its specific application area. The key to success is first to understand the use, and then determine the correct steel. There are usually only six types of steel related to the application of building construction. They all contain 17-22% of chromium, and better steels also contain nickel. The addition of molybdenum can further improve the atmospheric corrosion, especially to the chloride containing atmosphere.

Main different stainless steel

201, 202, etc.: Nickel manganese, corrosion resistance is relatively poor, the domestic widely used as a cheap alternative to the 300 series

304: Universal model; that is, 18/8 stainless steel. Products such as: corrosion-resistant containers, cutlery, furniture, railings, medical equipment. The standard composition is 18% chromium plus 8% nickel. It is a non-magnetic stainless steel that cannot be changed by its heat treatment method. GB brand is 0Cr18Ni9Ti.

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