Analysis of various definitions of 304 thick-walled stainless steel tubes

According to the classification standard of 304 stainless steel pipe in China, the definition of steel is: “With iron (Fe) as the main element, the carbon (C) content is generally below 2%, and contains other elements. According to the standard, stainless steel, corrosion-resistant steel, anti-oxidation steel and heat-resistant 304 stainless steel tubes are classified into one category, which are collectively referred to as "stainless, corrosion-resistant and heat-resistant steel". "But, strictly speaking, they are different. 304 stainless steel pipes should refer to steel that does not rust in air or near neutral medium; corrosion resistant steel should be referred to in some chemically corrosive media such as acid, Steels that can produce no or little corrosion in alkalis, salts and their solutions, seawater and some corrosive gases; 304 stainless steel pipes should be steels that are resistant to oxidation and creep in higher temperature environments. Of course, general resistance Both etched steel and heat-resistant steel have stainless steel characteristics. Customarily, stainless steel and corrosion-resistant steel are often referred to as stainless steel.

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