How To Weld Aluminum With A Dc Tig Welder. The flux cleans oxides from the aluminum and it helps shield the molten puddle. As said above the only way to weld aluminum and magnesium with the TIG process is on the alternating current.
The one point of consensus youll find online is that the welders who make DC TIG welding work the best on aluminum are welders with a lot of experience. How to setup tig welder for aluminum. Some of the basic rules are using optimum polarity adjust the balance control setting up output frequency and using appropriate amperage.
AC mode gives the best results for aluminum welding DC can also be used but the quality will be compromised.
Once the material has a thickness of over ΒΌ inch the rule of the thumb starts to deviate and not as much amp is needed. DC TIG aluminum welding is possible with a DCEN setting and pure helium. Its designed primarily for oxy-fuel welding aluminum but TIG. This includes argon and a slight composition of helium gas.