1, 12Cr 18Ni9Si3 belong to the national standard of austenitic stainless steel containing copper, and the implementation standard is GB /T 20878-2007.
2. 12Cr 18Ni9Si3 is a new national standard brand, and the corresponding old brand number is 1cr 18ni9si3.
3. 12Cr 18Ni9Si3 means 302 stainless steel plus 12 chromium 18 nickel and 9 silicon.
4. Chemical composition: C )≤0. 15, Si )≤ 1.00, Mn )≤2.00, P )≤0.045, S )≤0.030 and Ni ≤ 8.00 ~.
Extended data:
The invention and use of stainless steel can be traced back to the First World War. Henry buhrer, a British scientist, was commissioned by the British military arsenal to study the improvement of weapons.
The stainless steel invented by buhrer Leigh was patented in Britain in 19 16, and mass production began. Since then, stainless steel accidentally found in garbage has swept the world, and Henry buhrer Leigh is also known as the "father of stainless steel".
Stainless steel is usually divided into martensite steel, ferrite steel, austenite steel, austenite-ferrite (duplex) stainless steel and precipitation hardening stainless steel.
Can be divided into: chromium stainless steel, chromium nickel stainless steel and chromium manganese nitrogen stainless steel.
Reference: Baidu Encyclopedia-Stainless Steel