Austenite stainless steel refers to stainless steel with Austenite structure at room temperature. When the steel contains Cr about 18%, Ni 8% ≤ 25%, C about 0.1%, it has stable Austenite structure. Austenite chromium-nickel stainless steel includes famous 18Cr-8Ni steel and high Cr-Ni series steel which increasing Cr,Ni and adding Mo,Cu,Si,Nb,Ti and other elements. Austenite stainless steel is non-magnetic and has high toughness and plasticity, but its strength is low, so it can not be strengthened by phase transformation, but can only be strengthened by cold working. If S, Ca, se, Te and other elements are added, it has good machinability.
In addition to the corrosion resistance of oxidizing acid medium, this kind of steel can also resist the corrosion of sulfuric acid, phosphate, formic acid, acetic acid, urea and so on if it contains Mo,Cu and other elements. If the carbon content in this kind of steel is less than 0.03% or Ti,Ni, content is less than 0.03%, the intergranular corrosion resistance of this kind of steel can be significantly improved. High silicon Austenite stainless steel has good corrosion resistance to concentrated nitric acid. Because of its comprehensive and good comprehensive properties, austenite stainless steel has been widely used in various industries.