Guide to Welding Aluminum
Welding aluminum is not something most people need to do. The metal has a low enough melting point that welding is not usually necessary in most cases. If there is a large chunk of metal used, such as common with aircraft and certain vehicles, there may be some call for welding the metal.
Before a person can weld aluminum, he needs to understand what he is doing. The process is not technically welding. It is a hybrid between welding and soldering called brazing. Brazing requires a paste and a welder. The paste is heated and applied to the area that needs to be repaired or welded. When the paste melts between the two areas, the torch is removed and the area cools. If the aluminum welding job is done properly, the weld should hold for a long time. He will not need to do any more brazing jobs until a different part gets broken. Someone who work in a factory where aluminum products are made may find that he needs to go onto the next job.
Aluminum welding does not differ much from welding iron and steel, but it the process is not the same. A welder needs to learn the difference in order to work with aluminum and softer metals properly. Once he learns to work with aluminum, he can expand his skills to other metals with similar melting points. If he just needs to use the skill for a job or two, he can forget the job and move onto something else.