HBW2209 is used primarily to weld duplex stainless steels which contain approximately 22 percent of chromium such as UNS S31803 (alloy 2205). Deposits have “duplex” microstructures consisting of an
austenite-ferrite matrix. AFM ER2209 is characterized by high tensile strength, resistance to
stress corrosion cracking, and improved resistance to pitting.