EDM is material removing process for conductive work piece by applying a high frequency pulsed, electrical current to it through a solid electrode. EDM is used to machine conductive metals of any hardness or those which are difficult to cut with conventional methods. It is a type of non-conventional machining process that produces high quality products without any contact between the work piece and the tool, which are difficult to achieve by other conventional machining processes. This study on EDM with AISI 4340 as work piece and tungsten-copper as electrode is performed to establish the influence of EDM process parameters on material removal rate, tool wear rate and surface integrity. The experimental results concluded that the MRR and TWR are directly influenced by the process parameters. MRR and TWR are mainly influenced by the peak current. Ton is the second most influencing parameter for both MRR and TWR. Voltage is least influencing parameter. The surface integrity is influenced by the crater size and intensity of spark energy. Cracks are observed at higher intensity of spark energy due to induced heat.