Presentation discusses proven and cost-effective induction technology that allows contour hardening of pinion, bevel and hypoid gears and gear-like complex-geometry components utilizing inexpensive novel steels. This unique technology being an environmetally friendly process was specifically developed to replace carburizing process and eliminate utilization of costly highly-alloyed steels in gear hardening applications. Variety of case studies will be discussed in this presentation demonstrating chemical composition of steels, achieved hardness patterns, microstructure of hardened area, transition zone and core structure. Uniqueness of this technology is not only related to its capability to induction contour harden of complex-geometry components, but also allowing to obtain fine-grained martensitic structures (typical grain size ranges between 8-11) developing substantial compressive residual stresses that dramatically inmprove mechanical properties of induction hardened components.