Sidenor Stainless Steel 321 is austenitic chromium-nickel stainless steel that is non-temperable, non-magnetic, type 18-8. It has good corrosion resistance and good oxidation resistance of up to 850 ºC. This steel has a good degree of conformability in cold, and its hardening is greater than non-alloy steels, demanding larger conformation efforts. The scale that is present in hot conformation, in thermal treatment or in welding processes should be removed via pickling or machining. Intracrystalline corrosion resistance is guaranteed up to 350 ºC. Machining should be carried out using high speed steel or hard metal tools that have been well cooled. In its soluble state, it may present SLIGHTmagnetism which increases with cold deformation.