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Old 03-30-2008, 11:15 PM   #1 (permalink)
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Attaching Aluminum to Brass

With the price of Brass through the roof in most cases, is there any good methods to attach aluminum to brass? Will soldering work, or is it to much of a risk due to aluminums melting point? Any ideas?

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Old 03-30-2008, 11:23 PM   #2 (permalink)
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Duct tape or JB weld.

You shouldn't have a problem with it melting, solder melts at less than 400 Fahrenheit.. Aluminum melts at 1200 Faranheit.
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Old 03-30-2008, 11:29 PM   #3 (permalink)
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Soldering aluminum can be difficult, you really gotta scrub off the aluminum oxide, which forms somewhat quickly

Use flux, and try to avoid 5 and 6 series aluminums
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Old 03-30-2008, 11:44 PM   #4 (permalink)
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What sort of flux? And what aluminums have less oxide-forming characteristics?
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Old 03-31-2008, 01:53 AM   #5 (permalink)
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There are some aluminium "brazing" or "soldering" materials and some of them may even be compatible with brass. Otherwise it won't work. Traditional solders used for copper based alloys such as brass and for steel don't stick to aluminium at all. But some of the more exotic soldering metal mixtures may just be compatible for both metals.

I'd check with some of the welding supply outlets in your area and ask them. I've not seen any references to such a material.
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Old 03-31-2008, 03:17 AM   #6 (permalink)
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Quote:
Originally Posted by flyweightnate View Post
What sort of flux? And what aluminums have less oxide-forming characteristics?
Really not much difference there. Magnesium rich alloys are hard to solder to for other reasons. Aluminum itself reacts quickly to air, and so any alloy with less aluminum, I guess? really though, not much difference.

Scrub hard, scrub quick, paste some flux on to keep the oxygen out and Al fresh, and solder away
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Old 04-01-2008, 10:59 PM   #7 (permalink)
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Can you actually JB weld a PGP together? Just a weird thought.
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Old 04-01-2008, 11:09 PM   #8 (permalink)
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Yeah, I don't see why you couldn't.
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Old 04-03-2008, 12:25 AM   #9 (permalink)
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This stuff might be easier. The videos are pretty impressive.

Aluminum welding - Aluminum Repair - Aluminum Brazing - AluminumRepair.com
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Old 04-03-2008, 12:57 AM   #10 (permalink)
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Here you go, they even provide video.
aluminum welding, pot metal repair, cast iron, silver solder
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