Simply speaking, stainless steel is not steel that cannot rust, but steel that cannot rust easily. Early in 1910, people found that when 12% Cr is added in the plain carbon steel, it will have the properties of anti-corrosion and anti-oxidation. Therefore, in the general definition, stainless steel containing 12% Cr can be truly named stainless steel.

 

According to the clear definition of Grade and Chemical Composition made in the national standard of GB20878-2007 Stainless Steel and Heat-Resistant Steel: Stainless steel, features nonrust and corrosion resistance; the content of Cr should be 10.5% at least and the maximum carbon content shall not exceed 1.2%.

 

But According to the clear definition of Grade and Chemical Composition made in the national standard of GB20878-2007 Stainless Steel and Heat-Resistant Steel: Stainless steel, features nonrust and corrosion resistance; the content of Cr should be 10.5% at least and the maximum carbon content shall not exceed 1.2%.