Stainless steel marking method

Steel numbering and representation

1 Use the international chemical element symbol and the national symbol to represent the chemical composition, and use the Arabic alphabet to indicate the content of the ingredient:

Such as: China, Russia 12CrNi3A

2Use fixed number of digits to indicate steel series or numbers; for example: USA, Japan, 300 series, 400 series, 200 series;

3 The serial number is composed of Latin letters and sequences, indicating only the purpose.

China's numbering rules

1 using element symbols

2 use, Hanyu Pinyin, open hearth steel: P, boiling steel: F, killed steel: B, A steel: A, T8: special 8, GCr15: ball

◆Consolidated steel, spring steel, such as: 20CrMnTi 60SiMn (using C: 10,000 parts)

◆Stainless steel, alloy tool steel (representing C content in parts per thousand), 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

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

1 austenitic stainless steel with 200 and 300 series of digital signs

2 Ferritic and martensitic stainless steels are represented by numbers in the 400 series. For example, some of the more common 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, two-phase (austenitic-ferritic)

4 stainless steel, precipitation hardened stainless steel and high alloys containing less than 50% iron are usually named after patent names or trademarks.