In electrical discharge machining (EDM), Copper and Graphite are commonly used as electrode (tool) materials. EDM process is based on thermoelectric energy between an electrode and workpiece. In this paper, the effect of electrode wear rate (EWR) in 202 stainless steel is observed. Copper Electrode is used as tool material and SS 202 is used as workpiece. Copper electrode possess high structural integrity, so it can produce very fine surface finishes, even without special polishing circuits.