Before joining Al/steel using filler metal, trial joining of Al/Al and steel/steel was conducted with and without paste type filler metal. The parameters for
resistance spot brazing was decided without melting
on the interface between Al/Al and steel/steel. With
applying this combination, for spot brazing, the comparisons of peak load for joining show that there is no advantage of using paste type filler metal for resistance spot brazing. Therefore, experiments were moved on using sheet type filler metal (Al-12Si) for resistance spot brazing.