Fluxes are supplied in paste, liquid, dry and spray forms.

Molten brazing alloys require a clean surface on which to flow if they are to bond properly. Heating metal during the brazing process causes oxides to form on its surface. These oxides, if not removed, will prevent the filler metal from flowing completely. A coating of flux applied prior to heating the joint will protect the area from exposure to the air and absorb oxides, which may form on the surface.

Because different metals produce different oxides, several flux formulations have been developed to handle these variations. Specialized fluxes are available for both low- and high-temperature brazing of silver, aluminum, nickel-silver and bronze, as well as many soft-solder applications.

Fluxes conform to the following specifications:

White Flux

A.W.S. Brazing Flux Type No. 3

Fed. Spec. 0-F-499c Type B

AMS 3410F

Black Flux

Type No. 3

  

AMS 3411A

High temperature black flux for carbide tools

Various soft solder fluxes available

Paste fluxes are supplied in one- pound and five-pound jars or 65-pound pails. Liquid fluxes from one-pint to 55-gallon containers are available. Bernite 45, stocked in 10-pound, 50-pound and 100-pound drums is available for post-braze flux removal.