The Electrode Size For TIG Welding Aluminum

One of the most common mistakes for welders working with aluminum is they choose an electrode that is too small. You often need to consider a 1/8” electrode for welding aluminum in order to get enough heat and to create a stable arc. Too small an electrode will create a sloppy weld.

If you’re working on AC with a lanthanated electrode, you may be able to use a 3/16” or 3/32” electrode. The key is to match your electrode choice and size with the settings and the project.