Stainless steel is defined in GB/T20,878-2007 as a steel with stainless steel and corrosion resistance as its main characteristics, chromium content of at least 10.5% and carbon content of at most 1.2%.
Stainless steel is the abbreviation of stainless and acid resistant steel. The steel that is resistant to weak corrosive media such as air, steam and water or has stainless property is called stainless steel; The steel that is resistant to chemical corrosion medium is called acid resistant steel.
Due to the difference in chemical composition, their corrosion resistance is different. Ordinary stainless steel is generally not resistant to chemical medium corrosion, while acid resistant steel is generally stainless. The term "stainless steel" not only refers to one kind of stainless steel, but also refers to more than 100 kinds of industrial stainless steels. Each type of stainless steel developed has good performance in its specific application field.
Generally speaking, the hardness of stainless steel is higher than that of aluminum alloy, and the cost of stainless steel is higher than that of aluminum alloy.
