302 stainless steel rod 302 is an international stainless steel rod marked way. 302 stainless steel pipe - S30200 (U.S. AISI, ASTM)
302 corresponds to Chinese brands is specialized in selling metal 1Cr18Ni9 BoSheng
Characteristics and use: The high strength cold, but somewhat less elongation than 1Cr17Ni7. Building decoration parts.
Grades 302/1Cr18Ni9
State symbols tensile strength b / Mpa, not less than 5% elongation, not less than
BY 785 20
Y 980 10
TY 1130 5
That means the International Stainless Steel
American Iron and Steel Institute is a three-digit number used to mark a variety of standard-grade stainless steel can be forged. Of which:
① austenitic stainless steel with 200 and 300 series digital mark,
② ferritic and martensitic stainless steel 400 series with a digital representation. For example, some of the more common austenitic stainless steel
Is 302, 304, 316 and 310 as a symbol,
③ ferritic stainless steel is marked 430 and 446, and 440C martensitic stainless steel as standard is based on 410,420
Remember, two-phase (austenite - ferrite),
④ stainless steel, precipitation hardening stainless steel, and iron content of less than 50% of high alloy is usually used patent title or trademark name.
The number of steel
① chemical element with the symbol of international and national symbols to represent the chemical composition, with the Arabic alphabet to represent the components of content:
Such as: China, Russia 12CrNi3A
② with a fixed number of digits to represent the number of steel series or class; such as: USA, Japan, 300 series, 400 series, 200 series;
③ with the Latin alphabet and number sequence composition, saying only that use.
China's number rules
① using element symbols
② use, Hanyu Pinyin, open-hearth steel: P, boiling steel: F, killed steel: B, A Steel: A, T8: Special 8,
GCr15: Ball
◆ structural steel, spring steel, such as: 20CrMnTi 60SiMn, (with very few that C content)
◆ stainless steel, alloy tool steel (with a few thousandths of said C content), such as: 1Cr18Ni9 thousandth (ie,
0.1% C), such as stainless steel C ≤ 0.08% 0Cr18Ni9, ultra-low carbon C ≤ 0.03% as 0Cr17Ni13Mo