2 Reveal the steel series or numbers with the digits of static digits; for example, the United States, Japan, 300 series, 400 series, 200 series;
3 Use Latin letters and steps to form a serial number, only to reveal the use.
China's numbering and delimitation rules 1 The use of element identification logos 2 uses, Pinyin, open hearth steel: P, boiling steel: F, busy steel: B, A steel: A, T8: special 8, GCr15: ball â—†Mixed steel, spring steel, such as: 20CrMnTi 60SiMn, (express C content in several ten thousandths)
◆ stainless steel, alloy east-west steel (with a few thousandth reveal C content), such as: 1Cr18Ni9 one thousandth (ie 0.1% C), stainless steel C ≤ 0.08% such as 0Cr18Ni9, ultra-low carbon C ≤ 0.03% such as 00Cr17Ni13Mo
Outer Stainless Steel Marking Method The American Iron and Steel Institute uses three digits to indicate various types of standard grade wrought stainless steel. Here are:
1 Austenitic stainless steel is marked with 200 and 300 series numbers.
2 Ferritic and martensitic stainless steels are revealed with 400 series numbers. For example, some of the more mediocre austenitic stainless steels 201, 304, 316, and 310 are labeled 3 Ferritic stainless steels and thus 430 and 446 are marked signs, and martensitic stainless steels are therefore 410, 420, and 440C for marking, duplex (austenitic-ferritic),
4 Stainless steels, precipitation hardened stainless steels, and high alloys with less than 50% iron content are usually named after patent titles or trademarks.
Standard Classification and Classification 4-1 Classification Classification:
1 National Standard GB 2 Industrial Standard YB 3 Local Standard 4 Corporate Standard Q/CB
4-2 Category:
1 Product Standard 2 Packaging Standard 3 Method Standard 4 Base Standard 4-3 Standard Level (3 levels):
Y grade: foreign advanced level I level: the same level as the outside world H level: overseas advanced level 4-4 national standard GB1220-84 stainless steel bar (level I) GB4241-84 stainless steel welding disk park (H level)
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)
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