Austenitic chromium-nickel-molybdenum stainless steels: thanks to this combination, 316 (alphanumeric code X5CrNi17-12-2) and 316L (alphanumeric code X2CrNi17-12-2) are resistant to the action of chlorides, and for this reason are used in marine environments and in the chemical and food industries. They are also used for thermal applications, as well as in the automotive and furniture industries and for various other applications. In particular, 316L has a lower carbon content than 316, resulting in even higher resistance to intergranular corrosion and better weldability.
In addition to chromium (which guarantees stainlessness), austenitic stainless steels also contain high levels of nickel, which significantly increases corrosion resistance (some versions may also contain other elements such as molybdenum, titanium, and niobium). Although the austenitic structure does not allow for heat treatment, the cold deformation that the tube undergoes during drawing allows it to acquire very high mechanical characteristics, especially on small diameters. While completely non-magnetic in the solubilized state, they acquire a slight ferromagnetism in the drawn state.