Stainless Steel American Standard

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  • Publish Time:2022-08-29
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The American Iron and Steel Institute taking three digits to designate various standard grades of malleable stainless steel

①Austenitic stainless steel is marked with numbers of 200 and 300 series,

② Ferritic and martensitic stainless steels are represented by numbers in the 400 series. For example, some of austenitic stainless steels are marked with 201, 304, 316 and 310,

③ Ferritic stainless steel is marked with 430 and 446, martensitic stainless steel is marked with 410, 420 and 440C, duplex (austenite-ferrite),

④Stainless steel and precipitation hardening stainless steel and high alloys with iron content less than 50% are usually named by patent names or trademarks.

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