1. A METHOD OF MAKING AMETAL BODY INCLUDING A FIRST PART AND A SECOND PART JOINED AT A SEAM COMPRISING THE STEPS OF FORMING A GROOVE IN AT LEAST ONE OF SAID PARTS ALONG SAID SEAM, FILLING SAID GROOVE WITH A SECOND METAL HAVING A RELATIVELY HIGH ELECTRICAL REISTANCE WHEREBY SAID METAL IS IN CONTACT WITH EACH OF SAID PARTS AT SAID SEAM, SAID METAL HAVING A MELTING POINT WHICH IS SUBSTANTIALLY GREATER THAN THE METAL OF SAID BODY, AND SUBJECTING SAID SECOND METAL TO INDUCTION HEAT WHEREBY THE ADJACENT FACES OF SAID PARTS ALONG SAID SEAM ARE CAUSED TO MELT AND FUSE.