Effect of Filler Wire Composition on Joining Properties of GTAW Stainless Steel 202

This research intends to find out the effects of filler wire composition on joining properties of SS 202-welded with semi-automatic gas tungsten arc welding (GTAW) process. Hardness, tensile strength, surface roughness, and SEM/EDAX analysis of joints were evaluated with respect to different filler wires ER 308L, 316L, and 310. Single-V-butt joints were made on 6-mm-thick plates using semi-automatic GTAW process, while ER 308L exhibited high mechanical properties, and the ER 316L and 310 showed comparative less properties. SEM/EDAX analysis proved that high alloying elements are obtained in the joint made with ER 310, the ER 316L and ER 308L resulted in moderate and low amounts of elements that are responsible for resistance to corrosion and oxidation. It was concluded that ER 316L offered best compromise of mechanical properties and alloying elements from the view point of boiler application.