Stainless steel logo the method
steel number and said the method
① The international chemical element symbols and their symbols to represent the chemical composition, with Arabic alphabet to represent the composition content: such as
: China, Russia 12CrNi3A
② The fixed digit number to represent the steel series or digital; such as: USA, Japan , 300 series, 400 series, 200 series;
③ The Latin and the order of serial numbers, saying only that use. Number of
China the rules
1 element symbols
② uses Hanyu Pinyin, the open-hearth steel: P World Pipe network informed, boiling steel: F killed steel: A steel: A, T8: Special 8,
of GCr15: Ball
◆ the alloy structural steel, spring steel, such as: 20CrMnTi 60SiMn (with very few C content) and a few thousandths of
◆ stainless steel, alloy tool steel (C content), such as: 1Cr18Ni9 thousandth (namely
the 0.1% C), stainless steel C ≤ 0.08% 0Cr18Ni9, ultra-low carbon C ≤ 0.03% stainless steel, such as 0Cr17Ni13Mo
labeling method
U.S. Iron and Steel Institute is a three-digit number to mark a variety of standard grade malleable stainless steel. Of which: ① The
austenitic stainless steel 200 and 300 series of numbers marked
② The ferritic and martensitic stainless steel 400 series numbers indicate. For example World Steel Pipe News , some of the more common austenitic stainless steel
is 201, 304, 316 and 310 marked,
③ ferritic stainless steel is 430 and 446 mark, martensitic stainless steel is 410, 420 and 440C as standard
in mind, two-phase (austenite - ferrite body),
④ The stainless steel, high alloy precipitation hardened stainless steel and iron content of less than 50% is usually the name of the patent or trademark name.
4). The standard classification and grading
4-1 classification:
① The National Institute of Standards GB
② The industry standard of YB
, ③ local the standard
④ The enterprise standard Q / CB
4-2 Category:
① The standard the
② The packaging standard
③ The method the standard
(4) basic standards to
the level of 4-3 standard (three levels) the:
Y grade: the international advanced level
I level: international level
the H-class: domestic advanced The level
4-4 GB
GB1220-84 stainless steel rods (Level I)
GB4241-84 stainless steel welded plate Park (H)
GB1270 GB4356-84 stainless steel welded plate Garden (Level I)-80 stainless steel pipe (Level I)
GB12771-91 stainless steel pipe (Y)
GB3280-84 stainless steel cold plate (Level I)
GB4237-84 stainless steel heat board (Level I)
GB4239-91 stainless steel cold strip (Level I)