Induction hardening has become an increasingly popular heat-treatment method for steel due to its extremely fast processing speeds. Compared to other case hardening methods, the processing times are on the scale of seconds or minutes compared to hours in a carburization furnace. Typically a per-piece method, the processing speeds rival that of batch processing and, when done right, there is often no worry about scaling or decarburization due to the rapid heating and cooling. The process provides a hard, compressive surface suitable for high-wear and fatigue applications and the process can be done selectively, focusing on regions of interest instead of having to process the entire part.