Tech-Rod 2209 description: Tech-Rod 2209 is used to weld duplex stainless steels such as UNS Number N31803. The welds offer excellent resistance to stress corrosion, cracking and pitting. The microstructure of the weld metal consists of austenite and ferrite. The ferrite content of the weld metal will be lower than the ferrite content of type 2205 base metal. Welding
of duplex stainless steels calls for controlled parameters to achieve specified mechanical and corrosion resistant properties.