Numbering and Representation
1 The chemical composition is represented by the symbol of the international chemical element and the symbol of the country, and the content of the ingredient is expressed by the Arabic alphabet:
Such as: Russia 12CrNi3A
2 Use a fixed number of digits to represent steel series or numbers; for example: the United States, Japan, 300 Series, 400 Series, 200 Series;
3 Use Latin letters and sequence numbers to indicate only the purpose.
China's numbering rules
1 using element symbols
2 uses, Chinese Pinyin, open hearth steel: P, boiling steel: F, killed steel: B, A steel: A, T8: special 8,
◆Mixed steel, spring steel, such as: 20CrMnTi 60SiMn, (in thousands of minutes to indicate C content)
◆Stainless steel and alloy tool steel (in parts per thousand for C content), eg: 1Cr18Ni9 1/1000 (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 indicate various standard grades of malleable stainless steel. among them:
1 Austenitic stainless steel is marked with 200 and 300 series numbers.
2 Ferritic and martensitic stainless steels are represented by 400 series numbers. For example, some of the more common austenitic stainless steels
Is marked with 201, 304, 316, and 310,
3 Ferritic stainless steel is marked with 430 and 446, and martensitic stainless steel is marked with 410, 420 and 440C.
Remember, two-phase (austenitic-ferritic),
4 Stainless steels, precipitation hardened stainless steels, and high alloys containing less than 50% iron are usually patented or trademarked.
Standard classification and classification
1 National Standard GB 2 Industry Standard YB 3 Local Standard 4 Corporate Standard Q/CB
Stainless steel plate (2 photos)
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 Steel Bar (Class I) GB4241-84 Stainless Steel Pan Park (Class H)
GB4356-84 Stainless Welding Disk Park (Class I) GB1270-80 Stainless Steel Pipe (Class I)
GB12771-91 stainless steel welded pipe (Y grade) GB3280-84 stainless steel cold plate (Class I)
GB4237-84 Stainless Hot Plate (Class I) GB4239-91 Stainless Cold Plate (Class I)