Most standard welding techniques suits to Alloy 2205, except welding without filler metals, which results in excess ferrite. AS 1554.6 pre-qualify welding for 2205 with 2209 rods or electrodes so that the saved metal has the right adjusted duplex structure. Adding nitrogen to the shielding gas guarantees that sufficient austenite is added to the structure. The heat input must be maintained at a low level, and the utilization of pre or post heat must be stayed away from. The co-proficient of thermal expansion for Alloy 2205 grade is low; hence the distortion and stresses are lesser than that in austenite grades.
Applications
Chemical process vessels, piping and heat exchangers
Environment
Safety
CSR