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Aluminium Brazing Alloys

Brazing of aluminium alloys

Before beginning the brazing process, it is crucial to ensure that the oxidation layers are removed. These layers can be removed mechanically or by using a flux.

 

Brazing can be done with or without a flux. The use of flux is recommended for brazing with a torch or in an inert-gas condition. When brazing in a vacuum or an Argon atmosphere, no flux is needed.

 

Product Composition Application Solidus [°C] Liquidus [°C]
4047 88Al12Si / Automotive and HVACR components 577 582
(#718) 22% KA1F & CsA1F-based Polymer System
ZA-1 78Zn22Al / Cesium-based Polymer System HVAC components including Cu to Al. 441 471
After market repair.
    Automated applications with wire feed systems.    
ZA-2 98Zn2Al / Cesium-based Polymer System Hand braze repair of evaporator coils in the production environment 379 385
ZA-3 99.5Zn0.5Cu / Cesium-based Polymer System low porosity. 420 440
Excellent for Cu to Al