TIG welding aluminum

[Mr_Roboto]

Welp, I boogered up a pin hole in my AR-10 lower. Looking to get it filled in so I can re-drill. Anyone got a TIG and want to make a few bucks for 15 minutes work?

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[HILROD]

If you want to drive it to Elgin I can. I need to clean up my gas fume mess first. LOLOLO

 

[Mr_Roboto]

Get back to me with a price and when timing is good.

 

[HILROD]

I need to see what you need done but I put the tank and fuel lines back in my truck so it moves/won't blow up. Mainly nights and weekends.

 

[Gamble]

You can send it to me if you want

 

[Mr_Roboto]

Sadly, I am not looking for anything that complicated or beautiful. I have an 80% AR-10 lower that has a 5/32 hole in the wrong location. This needs to get filled up so I can redrill in a less wrong location. The gold rod up front goes through the one hole I'm looking to weld up.

Please note, stock footage NOT my AR lower. I do not have a 3 hole lower in any way shape or form.

 

[HILROD]

Do know what type of alloy it's made of? If it was mine I would try to plug the hole with like material tightly then try to weld it up. The body looks thin in that area. Keeping the heat down would be key.

 

[Mr_Roboto]

Pretty sure 7075. I was thinking copper block on the outside as needed.

 

[Gamble]

Pretty sure 7075. I was thinking copper block on the outside as needed.

Better double check that. 7075 is considered unweldable

 

[Mr_Roboto]

well, shit it is 7075. Guess I need to get a drop in pack and/or try epoxy. There goes a few $$$.

 

[Gamble]

Maybe someone can turn a round slug for you in a lathe then just press it in

 

[MrMezger996]

You can actually weld 7075/2024 aluminum. The risk is stress corrosion cracking after weld has been made. Depending where repair is made you run the risk of a fracture along the weld after the fact. You would be hard pressed to find any sort of shop to make this repair.