Duplex || S31803 || S32205 || 1.4462 || F51
S31803 || S32205 belongs to the family of duplex steels. This type of steel is characterised by a higher resistance to corrosion than for instance the austenitic type S32750. Related to this, the tension elastic limit is higher by about 150%.
The use of stainless duplex steels, especially of the types S31803 || S32205, achieved its popularity through the unique combination of resistance to corrosion, resistance to stress corrosion as well as a high strength and tension elastic limit. These properties and the unique strength values will make this material indispensable also in the future. The relatively low nickel content as compared to standard austenites makes it interesting also from an economic point of view.