*A method of welding in which thermite, a mixture of powdered aluminum or magnesium and iron scale, is used to heat themetal.

*That employs molten metal to permanently join the conductors. The process employs an exothermic reaction of a thermite composition to heat the metal, and requires no external source of heat or current.

*The chemical reaction that produces the heat is an alumino thermic reaction between aluminium powder and a metal oxide.