Performance Study of Dissimilar Alloy Joints of SS321 and SS347 Under MIG Welding Process

An attempt is made in this research work to study the influence of filler wire materials on the dissimilar alloys between SS321 and SS347 are made using Robotic MIG welding process Preliminary experimental welding trials are conducted by varying the MIG welding process parameters like current, welding speed and stick out the distance. The prepared metal coupons of two different stabilized stainless steels are welded using ER321 as well as ER347 filler wires. The performance of the joint is studied by mechanical testing and microstructural characterization. The results of mechanical testing showed that the welded joint with ER347 filler wire exhibited improved tensile strength and hardness value than the joint made by ER321 filler wire.