Multilayer clad aluminum material with improved brazing properties

This paper describes brazing experiments that were performed to illustrate the difference between Multiclad and standard clad material. The investigation has shown that an interlayer of AA 3003 between cladding and core acts as a diffusion barrier and significantly reduces silicon penetration into the core during brazing. As a direct consequence, the following benefits have been found in production tests: 1) Improved brazeability due to more available cladding. this implies lower leak rates and stronger brazed joints. 2) Improved strength of finished product. 3) Reduced risk of intergranular corrosion.