Stainless steel is a steel with stainless and corrosion resistance as the main characteristics, and the chromium content is at least 10.5%, and the carbon content does not exceed 1.2%. Steel grades that are resistant to weak corrosive media such as air, steam, water, or stainless steel are called stainless steel; and steel grades that are resistant to chemical corrosion media (acid, alkali, salt, etc.) corrosion are called acid-resistant steel.
The term "stainless steel" does not simply refer to one kind of stainless steel, but refers to more than one hundred kinds of industrial stainless steels, and each developed stainless steel has good performance in its specific application field. The key to success is first to understand the purpose, and then to determine the correct steel grade.
Stainless steel is often divided into martensitic steel, ferritic steel, austenitic steel, austenitic-ferritic (duplex) stainless steel and precipitation hardening stainless steel according to the organizational state. In addition, it can be divided into: chromium stainless steel, chromium-nickel stainless steel and chromium manganese nitrogen stainless steel.
