International stainless steel sheets labeling method

American Iron and Steel Institute is three numbers to mark a variety of standard grade wrought qiyi stainless steel 430ba. Where:
① austenitic stainless steel with 200 and 300 series of numerals,
② ferritic and martensitic stainless steel 400 series is represented by numbers. For example, some of the more common austenitic stainless steel is marked 201,304,316 and 310,
③ ferritic stainless steel coil suppliers is marked 430 and 446, 410, 420 and 440C martensitic stainless steel is marked, duplex (austenitic - ferritic),
④ stainless steel, precipitation hardening stainless steel and high-alloy iron content of less than 50% usually uses proprietary name or trademark name.