... steel, brass, copper, silver, gold, aluminum. A. Heating (hot forging, hot fitting and smelting)1. Hot ... different metals or metals with nonmetals through the heating based on the principle of hot expansion ... steel flat base, aluminum sheet and tubular electric heating elements of various forms.D. Annealing (tempering and ... welcome to contact for more information! Induction welding machine 15KW-160KW