Brazing Aluminium - RCCanada - Canada Radio Controlled Hobby Forum
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Old 09-18-2006, 06:25 PM   #1
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Brazing Aluminium

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I would like to do some simple brazing ie: fixing mufflers/ making mouse can mufflers , but cannot find any info on doing this. I have bought aluminium rods but they do not have flux on them like the brass ones and no one in any of the stores seems to know where to get flux or if I even need it. I have searched on google etc. and have come up empty. Any ideas?
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Old 09-18-2006, 06:33 PM   #2
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My recollection is that you do not need flux with those rods. You do need to brush the surfaces to be joined with a stainless steel wire brush.

Be careful not to overheat the parts !!
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Old 09-18-2006, 06:36 PM   #3
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Aluminum Welding

Hi there 72

Here's a link for you, give it a look.

I've got some more, just need to find them.

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Old 09-18-2006, 06:53 PM   #4
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aluminum welding

here's another site to check out 2
hope this helps

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Old 09-18-2006, 10:44 PM   #5
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This is the stuff I use it works the best of all I have tried.

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Old 09-19-2006, 01:11 PM   #6
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Wow, I don't think I would ever have found those links if I had spent the next ten years looking! Lots of reading, but this is what I was looking for. Thanks to all of you!!
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Old 09-20-2006, 08:03 PM   #7
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Haven't welded aluminum in years Yes you need a flux.Best rod I found was flux core.You will probably need to go to a welding supply shop.Better yet try and contact James Bisson JR or SR they both frequent here.I am sure they wouldn't mind some friendly competition.I would think there welding is all done by mig welding though.It doesn't require a flux as the tip of the welding gun has an enert gas shielding the weld (Argo or argon co2)
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Old 09-25-2006, 10:32 AM   #8
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I have used the aluminun rods without flux with great sucess, but you have to be aware that to use these rods, the temp of the piece you are welding has to be hot.. and I do mean hot. Like 734 degrees if i remember right. Or in that ball park.

A propane torch alone wasn't enough for the peice i was welding and had to use a oxy/ map gar combo to get it hot enough. Mind you, I was also welding a crank case half for a snowmobile too, but it all had to be hot.

I haven't tried an rc muffler yet, and sounds like an idea i will have to try.
And oh yes, that brass brush is very important, and only a brass brush.

And do not use that brush for anything else as any contamination will not let the weld penatrate and bond properly.
happy flying
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