Tig welding cast aluminum

This is how I tig weld cast aluminum.

[@williamminyard8508]

Great job! Been hacking away at aluminum for 26 years myself. Nice to see young smart men enjoying a craft.

[@KenOfHouston]

I like your designs and construction. Keep those videos coming!

[@dklord1]

Beautiful welding job. I love your aircraft and props. One day I will own one 😎

[@user-qf8lx1gh8c]

ผมต้องการซื้อแบบการสร้างเครื่องบินของคุณ

[@osbornebay944]

l have a Arc/Tig lift, not sure if it is DC balanced. Is your welder indicated it is alum balanced? If l use a AC welder (50 %), will it work on cast alum? thanks.

[@leonjohansson6542]

I've haven't welded aluminum but know that the natural oil on your fingers can contaminate some types of glue repairs. Is that a factor in welding?

[@jlewi555]

Leon Johansson You are correct. The oils from you skin can contaminate the aluminum. Before welding I always wipe everything down with acetone.

why not the 4043 filler?

[@williamminyard8508]

It would allow for some give. Give will eventually turn into breakage with cast aluminum.

@@williamminyard8508 What give means? I am not native english speaker so didnt understand it sorry.

[@RenKnight347]

@ I believe what Mr. Minyard means is that the 4043 filler element will be too soft for the cast aluminum allowing the flexing or what we call "give" at the joint while stress forces are being applied to the part. It is this flexing or "give" that introduces the stress cracking that could lead to structural failure of the component or part. In the video, James the welder mentioned that the bracket was from an outboard motor jet pump. So, in a marine environment, the original manufacturer of the bracket should have used at least a 5000 series cast aluminum thus the filler material should also be at least made from 5000 series aluminum if not a higher series should the 5000 series aluminum not be available. Hope this helps.

[@HokKan]

@@RenKnight347 xz