How To Weld Cast Aluminum With Tig. TIP 1 The single biggest tip for Tig welding aluminum castings is to use a heliumargon mix instead of straight argon. Wheels have some special coating on them so you need to use a really good cleaner then stainless steel brush to clean it.
So the best thing is to clean your cast aluminum properly before bringing the parts you intend to weld together. As a beginner it is recommended to use argon for welding aluminum. Any TIG welder can weld aluminum but there are several factors that will influence the ease quality and appearance of your project.
Again when it comes to cleaning or preparing cast aluminum for welding the basic things you need to consider are grease oil and water vapor.
Wheels have some special coating on them so you need to use a really good cleaner then stainless steel brush to clean it. Meaning welding a base material that is 125mm or 18 thick would need 125 amps. A 5050 argonhelium mix works great and so do mixes that contain up to 80 percent helium. TIG welding needs a shielding gas to guard the weld pool a common denominator between MIG and TIG processes.