Technical parameters of stainless steel

Steel symbol and representation
① chemical element with the international symbols and symbols to represent the country’s chemical composition, using the Arabic alphabet to represent the content:
Such as: China, Russia 12CrNi3
② with a fixed number of digits to represent the steel type series or digital; such as: USA, Japan, 300 series, 400 series, 200 series;
③ composition of the Latin alphabet and the order number, saying only that purpose.
China’s numbering rules
① using element symbols
② use Hanyu Pinyin, open-hearth steel: P, boiling steel: F, killed steel: B, Group A steel: A, T8: Special 8, GCr15: Ball
◆ alloy steel, spring steel, such as: 20CrMnTi 60SiMn, (with a very few that C content)
stainless steel, alloy tool steel (with a few thousandths C content), such as: 1Cr18Ni9 thousandth (ie, 0.1% C), stainless C≤0.08% as 0Cr18Ni9, ultra-low carbon C≤0.03% as 00Cr17Ni13Mo
International Stainless Steel labeling method
American Iron and Steel Institute with three digits to indicate a variety of standard grade stainless steel malleable. Among them:
① austenitic stainless steel 200 and 300 series of numerals, for example, some of the more common austenitic stainless steel is 201, 304, 316 and 310 marks.
② ferritic and martensitic stainless steel 400 series is represented by a number.
③ ferritic stainless steel is marked 430 and 446, 410, 420, and 440C martensitic stainless steel is marked.
④ duplex (austenitic – ferritic), stainless steel, precipitation hardening stainless steel and high alloy iron content of less than 50% usually uses proprietary name or trademark name.
4). Standard classification and grading
4-1 of Classification:
National Standard GB ② ① industry standards YB ③ ④ local standards enterprise standard Q / CB
4-2 Categories:
① ② Packaging Standard Products Standard Method Standard ③ ④ basic standards
4-3 standard level (three points):
Y levels: international advanced level class I: Class H common international level: the advanced level
4-4 GB
GB1220-84 stainless steel rods (I grade) GB4241-84 stainless steel plate welded Park (H level)
GB4356-84 stainless steel plate welded Park (I-level) GB1270-80 stainless steel tubing (I Class)
GB12771-91 stainless steel pipe (Y class) GB3280-84 stainless steel cold (I Class)
GB4237-84 stainless steel hot plate (I grade) GB4239-91 stainless steel cold strip (I Class)