Abstract: Recent days Nickel material has increasing applications in the manufacturing of various components and structure due to their inherent properties like as hardness. Nickel alloys are extensively used in aerospace, marine, and nuclear power generation, chemical, petrochemical and process industries. Nickel is an adaptable element and will alloy with most metals. At present very a small number of researchers developed precision machining processes with their useful parameters for the production of highly precise Nickel products. Enhanced surface integrity parameters can be achieved by the CNC turning process than with conventional grinding techniques. Present paper focuses the need of finding out machining characteristics of Nickel using high quality machine tools like CNC precision turning and the experiments were conducted according to Taguchi DOE with L 9 OA. The output parameter as machined surface flatness is analysed by using ANOVA. Spindle speed is having dominating effect on final machined surface flatness and minimum surface flatness is achieved up to 2.6 Ám.

Keywords: Nickel, Precision Turning, Flatness, Taguchi DOE, ANOVA.