Uniweld Releases Instructional Video on Joining Aluminum Tubes to Dissimilar Metals
Demonstrates how to join aluminum to copper using company’s soft solder kit
FORT LAUDERDALE, Fla. — Uniweld’s UNI-4300 Soft Solder Kit is designed to simplify the process of joining dissimilar metals, enabling HVAC technicians to join them with low heat, minimizing the possibility of melting the base metal, such as aluminum. The company’s UNI-4300 instructional video demonstrates one of the methods used to join an aluminum tube to a copper tube. The instructional video is available in both English and Spanish.
HVAC technicians many times have difficulty joining dissimilar metals like aluminum to copper, aluminum to brass, or copper to brass. This comes about due to the low melting property of aluminum itself, 1,218°F, and the application temperature of the most common and economical aluminum brazing alloys, which can have application temperatures of close to 1,000°. This leaves very little margin for error when heating the aluminum metal, and simultaneously, trying to achieve the appropriate application temperature of the brazing alloy.