Aluminum has displaced copper/brass as the material of choice for designing heat exchange products. Aluminum's strong, lightweight and long lasting characteristics are attractive attributes for any designer. The automotive condenser was the first significant product to use aluminum. It was the development of two new technologies that made that application possible.
The developments in controlled atmosphere aluminium brazing and breakthroughs in micro-extruded tube technology, aided the growing demand for aluminum in products like automotive condensers. Today, controlled atmosphere aluminum brazing is the preferred method to produce a wide range of heat exchange products.
The controlled atmosphere brazing (CAB) process heats a product to brazing temperatures while maintaining uniform temperatures within the product in an oxygen-free nitrogen atmosphere. During furnace brazing, a brazing sheet of aluminum/silicon alloy plate is heated to a liquid state and flows to form aluminium joints or fillets.
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