High temperature corrosion studies on the Ni based superalloys are the thrust areas of research nowadays. In this work, an attempt has been made to investigate the weldability, mechanical and metallurgical properties of the GTA weldments of Inconel 625 superalloy. Tensile studies In addition to mechanical characterization, the various zones of the weldments were subjected to cyclic air oxidation studies at 800 °C. Further the hot corroded samples were characterized using the combined techniques of optical microscopy, SEM/EDAX analysis. © 2013 University of Manchester and the authors.