The Best Tungsten Electrode for TIG Welding Aluminum

As we know, there are many different type TIG machines around. The TIG machines some offers inverter technology and all offers varying degrees of power, so it can be tough to figure out the best tungsten electrode for TIG welding aluminum. With that in mind, what is the best tungsten electrode for TIG welding aluminum? 

The tungsten electrodes you choose mainly depend on your particular TIG machine, and the thickness of the metal you’re welding. Besides, the settings you have available. Here are a few tips and general rules that will help you to choose the right tungsten electrode for TIG welding aluminum. Keep in mind that some of these tips may change based on your particular machine.

Some welders have a particular favorite kind of tungsten. They prefer to use thoriated or pure tungsten electrode, but each kind of tungsten electrodes listed above can work if welders have the right settings and the right application.

The following electrodes can be used for TIG welding aluminum, including 2% ceriated tungsten electrode (on AC), 2% lanthanated tungsten electrode (AC and DC), 1.5 lanthanated tungsten electrode(AC and DC), 2% thoriated tungsten electrode (DC only)and pure tungsten electrode (DC only), but there are a few rules and caveats that should follow.

Firstly, don’t use pure tungsten on the AC side since it will ball up, especially if you’re using an inverter.

Secondly, choose the right 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. As we know, the size of electrode is too small will create a sloppy weld, which is bad for products quality.

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.

While each tungsten electrode has its advantages and disadvantages, one of the safest bets is 2% lanthanated tungsten electrode, which is ground to a point with a flattened tip. Many welders prefer this electrode for both AC and DC because it holds up well and provides a stable arc for a clean weld.

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