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SilBrz repair on Aluminum

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SilBrz repair on Aluminum

Postby LtBadd » Sun Mar 05, 2017 6:09 pm

In a recent thread it was suggested to use silicon bronze to repair a pin hole in aluminum, so I thought I give a try to see what happens. I welded two 1/8" Al flats, drilled a hole and went for it.

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IMG_0489.JPG (37.2 KiB) Viewed 316 times


AL_SilBrz 2.jpg
Making the silbrz weld, notice green tint
AL_SilBrz 2.jpg (20.49 KiB) Viewed 316 times


Img_0494a.jpg
completed repair
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Img_0494a1.jpg
Img_0494a1.jpg (81.66 KiB) Viewed 316 times
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Re: SilBrz repair on Aluminum

Postby Farmwelding » Sun Mar 05, 2017 6:14 pm

Since the aluminum melts at a lower temp that should be expected-silicon bronze and aluminum mixing kind of like steel and aluminum it isn't gonna work to well. I feel bad you had to ruin such a nice bead.
That is some nasty aluminum you have there though.
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Re: SilBrz repair on Aluminum

Postby 5th Street Fab » Sun Mar 05, 2017 7:12 pm

LtBadd wrote:In a recent thread it was suggested to use silicon bronze to repair a pin hole in aluminum, so I thought I give a try to see what happens. I welded two 1/8" Al flats, drilled a hole and went for it.

IMG_0489.JPG


AL_SilBrz 2.jpg


Img_0494a.jpg


Img_0494a1.jpg

I tried yesterday too since I had it out. But tried on DC and it just wandered and rolled it up

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Re: SilBrz repair on Aluminum

Postby LtBadd » Sun Mar 05, 2017 7:55 pm

5th Street Fab wrote:I tried yesterday too since I had it out. But tried on DC and it just wandered and rolled it up

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I did use Dc for the Silbrz weld
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Re: SilBrz repair on Aluminum

Postby 5th Street Fab » Sun Mar 05, 2017 11:12 pm

LtBadd wrote:
5th Street Fab wrote:I tried yesterday too since I had it out. But tried on DC and it just wandered and rolled it up

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I did use Dc for the Silbrz weld

Hmm just looked really dull figured it was ac, I might try that and see if anything different happens


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Re: SilBrz repair on Aluminum

Postby Rudy Ray » Mon Mar 06, 2017 1:11 am

Would Aluminum Bronze work on Aluminum?
I don't have any or I'd try it myself.
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Re: SilBrz repair on Aluminum

Postby Rudy Ray » Thu Mar 16, 2017 12:07 am

I just ordered some Alum Bronz, holy crap that stuff is more expensive than I thought it would be. $15/lb & only a 10 lb box. I have a use for at least 3 lbs of it to save a $850 part on my sheet metal break, so it is worth it.

And I'll try it on aluminum and report back.
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Re: SilBrz repair on Aluminum

Postby weldin mike 27 » Thu Mar 16, 2017 3:57 am

I have a friend who is going to send me a few sticks of sil-bro to try in exchange for some codes. One day....... :cry:
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Re: SilBrz repair on Aluminum

Postby MinnesotaDave » Thu Mar 16, 2017 11:03 pm

I guess I'm puzzled by this thread?
I've not seen any listings for sil-bronze or alum-bronze used for joining aluminum?
Did I miss something?

I recently used some alum-bronze rod to tig braze a cast iron piece - worked very well.

I expected it to though as the A2 alum-bronze I bought was specifically listed for cast iron and Jody had done a video on it as well (much appreciated by the way :) ).
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Re: SilBrz repair on Aluminum

Postby weldin mike 27 » Fri Mar 17, 2017 4:23 am

The initial post is completely on the wrong track. No use for sil-bro or al-bro on aluminium. But as usual we hi jacked the thread.
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