The formation of stainless steel is achieved by adding other relevant elements during the steel smelting process, resulting in the final alloy having corrosion resistance. The corrosion resistance of stainless steel decreases with the increase of carbon content, therefore, most stainless steels have low carbon content, with a maximum of no more than 1.2%. Some steels have ω C (carbon content) is even lower than 0.03% (such as 00Cr12). The main alloying element in stainless steel is Cr (chromium), and only when the Cr content reaches a certain value, the steel has corrosion resistance. Therefore, stainless steel generally has a Cr (chromium) content of at least 10.5%. Stainless steel also contains elements such as Ni, Ti, Mn, N, Nb, Mo, Si, Cu, etc. The effect of stainless steel annealing:

1. Reduce hardness and improve plasticity;

2. Refine product particles and eliminate organizational deficiencies;

3. Eliminate internal stress;

4. Prepare the organization for quenching.