Wire electrical discharge machining (WEDM) is a specialized thermal machining process capable of accurately machining parts which have varying hardness, complex shapes and sharp edges that are very difficult to be machined by the traditional machining processes this research paper to optimize machining parameters of dimensional accuracy in wire cut electric discharge machining (WEDM). The effects of various process parameters of WEDM like pulse on time (TON), pulse off time (TOFF) and wire feed (WF). On different process response parameters such as material removal rate (MRR), surface roughness (Ra), with TAGUCHI analysis and Analysis of variance (ANOVA) is used to study the effect of process parameters on machining process. Have been investigated to reveal their impact on material removal rate (MRR) and surface roughness (Ra) of High carbon high chromium (HCHCr). © 2015 Elsevier B.V., All rights reserved.