Gold-containing brazing filler metals

Abstract

Brazing filler metals which contain 37 to 82 per cent gold are used for brazing of iron-, nickel- and cobalt-base alloys in application in which high resistance to oxidation or corrosion is required. Because of their low rate of interaction with the base metal, they are ideal for joining thin sections of materials and are commonly used for this purpose. The American Welding Society (AWS) has designated several standard composition groupings to accommodate different temperature requirements—to permit step-brazing, for example— and brazing processes, including those applicable to vacuum furnaces.

At the recent Brazing and Soldering Conference held in Philadelphia, from April 24–29th, the AWS and the Gold Institute jointly sponsored a symposium at which the development of several new gold alloys and their comparative performances were discussed.