What is Aluminum Brazing? Metallurgical mount at 30x of aluminum braze showing voids Aluminum brazing is a specialized process that uses filler metal to bond two parts without melting the substrate. It is unique in its ability to create a strong, reliable joint without compromising the integrity of the aluminum. This is done by using a filler metal such as copper or silver that has a higher melting point than the aluminum being brazed. A metallurgical bond is formed betwee