Steel Identification Method
Jun 05, 2023
The American Iron and Steel Institute uses three digits to indicate various standard grades of malleable stainless steel. Among them: ① Austenitic stainless steel is marked with numbers from the 200 and 300 series, for example, some more ordinary austenitic stainless steels are marked with numbers 201, 304, 316, and 310,
② Ferritic and martensitic stainless steels are represented by 400 series numbers.
③ Ferritic stainless steel is marked with 430 and 446, and Martensitic stainless steel is marked with 410, 420 and 440C,
④ Stainless steel, precipitation hardened stainless steel, and high alloys with an iron content of less than 50% are usually named under patent or trademark names.
