2209 is a duplex stainless filler metal for welding duplex stainless steels. Weldability as well as properties of the all-weld metal is excellent. Corrosion resistance is equal to 904L in most applications. 2209 is used for welding of duplex stainless steels such as 2205 and 2304. It can also be used for welding of duplex stainless steels to carbon steel and for cladding. It is used for Submerged Arc Welding.