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01-21-2004, 06:33 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Can you weld cast aluminum?
....like you can weld sheet aluminum with an aluminum mig? Or do you have to braze it?
Last edited by blykins; 01-21-2004 at 06:36 AM..
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01-21-2004, 07:26 AM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
sure you can!
It can be MIG TIG or as you said brazed. I have had good luck with an Aluminium solder called Allsolder 500 from JW Harris. If it is structural at all stick with the TIG. I'd be interested in the application.
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01-21-2004, 07:28 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
AC pedal pads to cast aluminum Wilwood pedals...
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01-21-2004, 07:58 AM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
I'd TIG it. Let me know if ya need help.
Cheers
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01-21-2004, 08:13 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
I don't have a TIG...I'll have to take it somewhere and have it done. Thanks for the input...
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01-23-2004, 06:22 AM
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CC Member
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Join Date: Jan 2004
Location: Shawbury,
Posts: 325
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Not Ranked
Is it possible to mig weld a sheet aluminum plate to a cast aluminum intake manifold if I heat the manifold before welding to prevent cracks?
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01-27-2004, 07:53 AM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
Preheating is a good idea anyway, aluminium is such a good thermal conductor it sucks the heat away from the weld causing cracking at any major heat difference areas. If your welding a sheet to it, keep it thick enough to not burn it up. TIG is helpful with different thicknesses as you can direct the heat more where it's needed. Another important consideration is getting it clean, clean. With MIG it should be pretty much blasting its way through the aluminium oxide anyway if it's set for enough penetration. That should work if you can't bracket off the carb flange or similar.
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01-27-2004, 08:46 AM
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CC Member
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Join Date: May 1999
Location: Tyler, TX U.S.A.,
TX
Cobra Make, Engine: ERA, Ford 428 SCJ
Posts: 332
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Not Ranked
TIG it.
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01-27-2004, 09:58 AM
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CC Member
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Join Date: May 2003
Location: Newburgh, IN,
IN
Cobra Make, Engine: 427SC Unique
Posts: 481
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Not Ranked
Your pedals should be clean ,however, if you have any cast that you wish to weld that is contaminated with oil,grease,fluid,etc. that can be a problem. Cast is so porous it retains everything . Baking the material will help with the heat aspect as Mike said and it will also help clean the pores of the surface as well.
Brent |
01-28-2004, 07:53 AM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
The worst thing on welding castings is if there's sand or any inclusions in the metal. That really causes it to open up. If you can, ensure you get good castings, if not remove what you can to get solid metal.
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