The most widely used austenite steel is the 304 also known as 18/8 for its composite, Accompanying the development of materials in manufacturing the 304 steel having high hardness. Nevertheless, such materials are machining by various machine but the difficult is material removal rate depends on the cutting speed and also the good surface roughness. The effect of the various process parameters of WEDM like discharge current, wire speed, wire tension, dielectric flow rate, pulse on time (TON), pulse off time (TOFF) have been investigated to reveal their impact on output parameter i.e., Material Removal Rate(MRR) and Surface Roughness of Stainless Steel 304 using RSM Design called a face centered Design. The optimal set of process parameters has also been predicted to maximize the MRR and Surface Finish. © 2019 Elsevier B.V., All rights reserved.