304 sanitary grade stainless steel pipe number and representation


304 sanitary grade stainless steel pipe number and representation method 304 sanitary grade stainless steel pipe number and representation method 1 uses the international chemical element symbol and the national symbol to indicate the chemical composition, and the Arabic alphabet to indicate the component content:

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 rule 1 uses element symbols

2 uses, Chinese Pinyin, open hearth steel: P, boiling steel: F, killed steel: B, A steel: A, T8: special 8,

GCr15: Ball

â—†Consolidated steel, spring steel, such as: 20CrMnTi 60SiMn, (using a few ten thousandths to indicate C content)

â—†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

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