302 stainless steel has high strength after cold working, but the elongation is slightly worse than 1Cr17Ni7. Decorative components for construction.
intro
302 Stainless steel belongs to the international stainless steel marking method. 302 Stainless Steel --S30210(AISI, ASTM)
The corresponding Chinese brand number of 302 is 12Cr18Ni9
International stainless steel labeling method
The American Iron and Steel Institute uses three digits to label various standard grades of malleable stainless steel. Among them:
① Austenitic stainless steel with 200 and 300 series of digital marks.
② Ferrite and martensitic stainless steel are represented by 400 series numbers. For example, some of the more common austenitic stainless steels
They are labeled 302, 304, 316, and 310.
③ Ferritic stainless steel is marked with 430 and 446, and martensitic stainless steel is marked with 410, 420 and 440C
Note, biphase (austenite-ferrite).
Stainless steel, precipitation-hardened stainless steel and high alloys with an iron content of less than 50% are usually patented or trademarked names.
Numbering and representation of steel
① Use the international chemical element symbol and the national symbol to indicate the chemical composition, and use the Arabic alphabet to indicate the component content:
For example: China, Russia 12CrNi3A.
② Use fixed digit numbers to represent steel series or numbers; Such as: the United States, Japan, 300, 400, 200.
③ Use the Latin alphabet and order to form the serial number, only to indicate the purpose.
Numbering rules of our country
① Use element symbols
② Use, Chinese Pinyin, open-hearth steel :P, boiling steel :F, killed steel :B, Class A steel :A, T8: special 8,
GCr15: Ball bearing
◆ Binding steel, spring steel, such as :20CrMnTi 60SiMn, (with a few parts of the C content)
◆ Stainless steel, alloy tool steel (with a few thousandths of C content), such as :1Cr18Ni9 thousandth (i.e
0.1%C), stainless C≤0.08% such as 0Cr18Ni9, ultra-low carbon C≤0.03% such as 0Cr17Ni13Mo
Chemical composition and properties
Folded component
302 Stainless steel GB/T1220-1992
C 0.15 or less
Mn 2.00 or less
Si 1.00 or less
P 0.035 or less
S 0.030 or less
Ni acuities were 8.00 to 10.00
Cr 17.00 19.00 or less
Folding mechanical properties
Elongation /%:≥40
