Metals used in automotive, aerospace and defense, and other industries are required to have certain physical and chemical properties based on their use. Metal heat treatment is a process that is used for changing the physical and chemical properties of metal to attain the desired engineered requirements. The process involves heating of metals in a furnace to change their metallurgical properties. Furnaces heat the metals up to 2,000-2,700°C following which the metals are subjected to different processes such as annealing, hardening, brazing, quenching, and carburizing. In the metal heat treatment process, the absence of air as well as other gases in the furnace averts heat transfer through convection, resulting in zero possibility of contamination.