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AG 45 253

Description and uses

Unitor AG-45 is a very fluid silver brazing alloy with high capillary action, for joining all types of steel, stainless steel, copper alloys, nickel alloys, cast steel, malleable iron, SG iron and hard metal.

The alloy is cadmium-free and may therefore be used for brazing equipment carrying drinking water or food. AG-45 utilises capillary action and good mating of joint faces is essential to obtain the required.

Hard metal bit, silver brazed to a lathe tool

Maximum capillary gap is 0.1 mm. When silver brazing brass fittings to copper pipe, the filler metal must have 45% silver content in order to obtain a proper joint.

AG-45 is Phosphorous free. (Norwegian regulations prohibit the use of filler metal with phosphorous content for brazing brass pipes or red bronze (sleeve bends)). The joint faces must be cleaned properly. Apply flux AG-60/45 Flux-252 PF, which is in paste form, to the filler rod and the surfaces. It is essential to coat the surfaces with paste in order to «moisten» the metal and ensure correct capillary action. Use a neutral flame. The area to be brazed should be heated evenly to 600–650°C, and the flame must be kept in continuous motion until the flux has melted. Too much heat may give unsatisfactory results. Melt off and spread a drop of the rod while moving the flame continuously. Flux residue after brazing must be removed with hot water and a steel wire brush. For brazing of salt water-resistant Yorcalbro and Cunifer pipes, Unitor AG 60 252 is recommended.

3.05

Brazing brass bends to copper pipes. Maximum capillary gap between joint surfaces 0.1 mm. Coat joint surfaces with flux

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