Alumaweld????

[Ritz413]

I got these rods at a local horror freight store

From the name alone you believe they are for joining aluminum.
Today I tried again. Clean new stock, first with propane[2000 deg.] And then with mapp gas [3700 deg.]. Mapp gas did a better job faster...and as you can see did not get it to stick to either piece.

Has anyone ever successfully joined metal using these low temp welding sticks??

 

[PonkyKong]

I think you need flux and surface prep. Should flow like solder.

 

[OnwardGuinevere]

Probably need to sand the aluminum to remove any coatings that aren't allowing it to stick...

Not sure if aluminum is similar to copper, but cleaning the metal and heating it to the right temp, then flux and solder...I'd thing that should work.

 

[CertifiedMike]

Sand and wipe surfaces with alcohol. Then heat and weld.

 

[C life]

Its super hard to oxy fuel weld aluminum, I can't imagine this would be any easier. I picked up an ac/dc tig machine from Eastwood a couple years ago. It was like 700 bucks shipped to my door. I've used it a ton and its been awesome. Repaired an old IT400 case and I was super impressed with it.

 

[Ritz413]

Sanded, alcohol wiped. Mapp gas, and stuff is stuck to other stuff.

 

[CertifiedMike]

Sanded, alcohol wiped. Mapp gas, and stuff is stuck to other stuff. View attachment 278433

But did it stick to the right stuff too?

 

[Ritz413]

But did it stick to the right stuff too?

The sticking seems good...there is some deformation of the surrounding metal that is less impressive.

 

[Ritz413]

When stressed, even by hand, the sticking is very temporary.

 

[CertifiedMike]

When stressed, even by hand, the sticking is very temporary.
View attachment 278434

Did both pieces get hot enough?

Oil on surface is all else I can think of.

It should bond better than that.

 

[Ritz413]

Did both pieces get hot enough?

Oil on surface is all else I can think of.

It should bond better than that.

Certainly should have been hot enough. It stuck in 1 spot better than the others but still not impressive

 

[RippingLegos]

Is this about boats?

 

[Ritz413]

Is this about boats?

Yes....new prototype for the USS-RC10. I'll figure out the gold anodizing later

 

[Guest D]

When stressed, even by hand, the sticking is very temporary.
View attachment 278434

You're brazing, not welding. You need to hit the surface with a heavier grit so the melted aluminum has something to grab on to. I wouldn't use that for anything structural.

 

[Mrgoodwrench35]

I got these rods at a local horror freight storeView attachment 278423
From the name alone you believe they are for joining aluminum.
Today I tried again. Clean new stock, first with propane[2000 deg.] And then with mapp gas [3700 deg.]. Mapp gas did a better job faster...and as you can see did not get it to stick to either piece.
View attachment 278424
Has anyone ever successfully joined metal using these low temp welding sticks??

No. A tig welder is the only good solution.