HEAT resistive alloys characterized by difficult machining properties, due to work hardening of work material hence limitation of high parameters and efforts to reduce cutting load and hence cutting temperature. Therefore, it is necessary for the cutting edge to retain its properties over an extended period. Over the years, m/s sumitomo has experienced covering machining applications of heat resistive alloys or else called exotic material. These materials primarily used in engine valve seat, stellite welded engine valve, high temperature & lightweight applications in aerospace industry & defence applications, valves used in process industry.