using aluminum brazing rod and torch to repair holes

[sleblanc]

hey guys i got a couple long holes on the bottom of my transom where is got dropped out of a truck and i was thinking of trying to get some brazing rods or something similar from Tractor supply to fix these. i dont have access to a mig setup for aluminum. but i think these brazing rods may work if i take my time, or i can get some aluminum sticks for my welder that will run at 120amps. any of you guys have experience with this? the two holes are about 4-6in long each not much gap to be filled in i was able to hammer them closed.

 

[lckstckn2smknbrls]

I would rivet a patch with 3m 5200 over it before I used the brazing rods.

 

[sleblanc]

Will just have to get it welded then I worry about using a patch and 5200 where the transom and bottom meet unless you guys think that would hold? But of course the best I am sure is to still weld it. What are your thoughts?

 

[PSG-1]

MIG, or TIG welding with ER5356 wire and 100% Argon would be the best fix.

I have used aluminum rods with a stick welder. They don't produce the strongest welds, though, they tend to have porosity. As for brazing aluminum, it can be done, but it is quite a bit more difficult than brazing steel. In either case, it would be a good idea to use a backup plate behind it, to act as a heat sink, so you don't melt a giant hole in the boat.

 

[seif5034]

PSG-1 » Sat Nov 30, 2013 3:50 pm[/url]"]

I have used aluminum rods with a stick welder. They don't produce the strongest welds, though, they tend to have porosity.

Mind sharing info on what stick and amperage?

 

[PSG-1]

Here's some info for aluminum rods:

https://www.magmaweld.com/eal_4043_aluminum_stick_electrode.html

 

[seif5034]

Thank-you Sir

 

[jvanhees]

I would rivet a patch with 3m 5200 over it before I used the brazing rods.

This and or marine tex

 

[rscottp]

Marine-Tex is really good stuff!