Stainless steel plate commonly used marking method

　　Numbering and representation

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

　　For example: China, Russia 12CrNi3A

　　② Use fixed digit numbers to represent steel series or numbers; Such as: United States, Japan, 300 systems, 400 systems, 200 systems;

　　③ Use the Latin alphabet and order to form the serial number, only to indicate the purpose.

　　Numbering rules of our country

　　① Use element symbols

　　② Use, Chinese Pinyin, open-hearth steel: P, boiling steel: F, killed steel: B, Class A steel: A, T8: special 8.

　　GCr15: Ball bearing

　　◆ Binding steel, spring steel, such as: 20CrMnTi 60SiMn, (with a few parts of the C content)

　　◆ Stainless steel, alloy tool steel (with a few thousandths of C content), such as: 1Cr18Ni91/000C (that is, 0.1%C), stainless C≤0.08% such as 0Cr18Ni9. ultra-low carbon C≤0.03% such as 0Cr17Ni13Mo

　　International stainless steel labeling method

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

　　① Austenitic stainless steel with 200 and 300 series of digital marks,

　　② Ferrite and martensitic stainless steel are represented by 400 series numbers. For example, some of the more common austenitic stainless steels are labeled 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, biphase (austenite-ferrite),

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

　　Standard classification and grading

　　4-1 Classification Classification:

　　① National standard GB ② Industry standard YB ③ Local standard ④ Enterprise standard Q/CB stainless steel plate (2 sheets)

　　4-2 Categories:

　　① Product standards ② packaging standards ③ method standards ④ basic standards

　　4-3 Standard level (three levels) :

　　Y level: International advanced level I level: international general level H level: domestic advanced level

　　4-4 National standard

　　GB1220-84 Stainless bar (Grade I) GB4241-84 stainless welding disk (Grade H)

　　GB4356-84 Stainless welding disk (Class I) GB1270-80 stainless pipe (Class I)

　　GB12771-91 Stainless welded pipe (Y level) GB3280-84 stainless cold plate (I level)

　　GB4237-84 Stainless hot plate (Class I) GB4239-91 Stainless Cold Belt (Class I)