Ferritic nitrocarburizing (FNC) is a thermochemical treatment that introduces both nitrogen and carbon into ferrous metals at temperatures in the ferrite plus carbide region of the phase diagrams. Plain carbon steels, low alloy steels and cast irons can form a surface compound layer by FNC treatment along with a diffusion zone below the compound layer. Thus, FNC process improves the surface properties mainly including wear, corrosion, and fatigue resistance, the added advantage includes a short process cycle and little distortion because of low temperature heat treatment. The processing temperature ranges from 525 to 650, the typical processing temperature is around 565.