Simplicity of operation and simple equipment.
Less time requirement.
Low Surface impurities and oxide films.
Compare to resistance butt welding produces improved welds at higher speed and lower cost, less electric current is required.
Heat affected zone is small as compare to conventional flash welding.
Less shortening of the component, as compared to that in flash or butt welding.
There is no flux, gas, filler metal or slag present to cause imperfections in welds.