... annealing; precious metals smelting.Brazing, thermal deformation, hardening, annealing, modulation, and a variety of ... , knives, utensils, agricultural implements, iron and steel, steel, railway equipment, aerospace , weapons manufacturing, electrical ... hardening, annealing, motors, valves, welding, tungsten, molybdenum, and copper tungsten alloy sintering as well as gold and silver melting induction ...