What is the 321 stainless steel?

321 stainless steel refers to stainless steel with an austenitic structure at room temperature. When the steel contains about 18% Cr, 8% to 25% Ni, and about 0.1% C, it has a stable austenite structure. Austenitic chromium-nickel stainless steel includes the famous 18Cr-8Ni steel and high Cr-Ni series steel developed by adding Cr and Ni content and adding Mo, Cu, Si, Nb, Ti and other elements on this basis. 321 austenitic stainless steel is non-magnetic and has high toughness and plasticity, but its strength is low, and it is impossible to strengthen it through phase transformation. It can only be strengthened by cold working. If elements such as S, Ca, Se, Te, etc. are added, it has good cutting ability. Sex.

In addition to oxidizing acid corrosion resistance, 321 austenitic stainless steel can also be resistant to corrosion by sulfuric acid, phosphoric acid, formic acid, acetic acid, urea, etc. if it contains elements such as Mo and Cu. If the carbon content in this type of steel is less than 0.03% or contains Ti and Ni, its resistance to intergranular corrosion can be significantly improved. The high-silicon 321 stainless steel has good corrosion resistance to concentrated nitric acid. Because 321 stainless steel has comprehensive and good comprehensive properties, it has been widely used in all walks of life.