International stainless steel numbering principle

①Stainless steel products use international chemical element symbols and national symbols to represent chemical components, and Arabic letters to represent component content:

Such as: China, Russia 12CrNi3A

②Use fixed-digit numbers to indicate steel series or numbers; such as: the United States, Japan, 300 series, 400 series, 200 series;

③The serial number is composed of Latin letters and sequence, which only indicates the purpose.

my country's numbering rules

①Using element symbols

②Usage, Chinese Pinyin, open hearth steel: P, boiling steel: F, killed steel: B, Class A steel: A, T8: special 8, GCr15: ball

◆Composite steel, spring steel, such as: 20CrMnTi60SiMn, (use a few ten thousandths to express the content of C)

◆Stainless steel, alloy tool steel (using a few thousandths to express C content), such as: 1Cr18Ni9 one thousandth (ie 0.1%C), stainless C≤0.08% such as 0Cr18Ni9, ultra-low carbon C≤0.03% Such as 0Cr17Ni13Mo

International stainless steel marking method (Guide: Standard parts electric heating hot forging equipment)

The American Iron and Steel Institute uses three digits to indicate various standard grades of forgeable stainless steel. among them:

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

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

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

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

More related stamping stainless steel products industry news: