Butt weldingis another type of electric resistant welding. The two weld metals are placed in a machine in face to face matching and both are clamped separately. These clamps are act as a electrode. These clamps are carry the current. The weld metals are matched correctly same axes and same line touching each other. Both weld metals are holding under pressure. The source current is given through the electrode to the weld metal and supply is continue until its reaching melting temperature. Previously load is applied to the metal and sufficient melting temperature, both are play master role for completed the butt weld.