Differences in stainless steel
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I have a question regarding stainless steels that I’d like to ask everyone: How are austenitic stainless steels, martensitic stainless steels, ferritic stainless steels, etc., distinguished from one another based on their types? I think the types of martensite and ferrite are quite similar; it’s not easy to tell them apart, right? The content of elements is also an important indicator for differentiation, right?
Reply to 1# Niu Honghong: The following is for reference only: 1. Looking at the chemical composition, in simple terms, martensite is Cr12, ferrite is Cr17, and austenite contains Ni and Cr ； 2. Look at the grade number; it starts with the words “martensite”, such as 201, 204, etc ； Austenitic grades start with the number 3, such as 304, 316, 347, etc ； Ferritic grades start with the number 4, such as 405, 410, 430, etc ； 3. In terms of ferromagnetism, austenitic stainless steel is non-magnetic ；