Abstract In the present study, gas tungsten arc welding was employed to weld Ti-stabilized 439 ferritic stainless steel using 308L austenitic filler electrode with varying heat input, i.e., low input (LHI) and high (HHI). The optical microstructure revealed formation of retained austenite (RA) ferrite in zone (WZ), whereas peppery structure consisting chromium-rich carbides were observed heat-a...