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aluminum to magnesium

Posted: Sat Mar 05, 2016 5:17 pm
by geo
A hobby turned to an primary income and need to learn more and stock more and expand instead of saying no.

I have an "unubtanium" old Japanese clutch cover to repair if possible. It has a sizable hole ('bout 2" dia.)on a relativly flat surface and has Magnesium content (vinegar tested).
Easiest and purdiest thing to do is pound out a "bandage" from 6061 and weld it on.

Is there a rod to help me here? Kinda like stocking 309L but for these alloys. If not, can a proper bead of az101 or something else first, then make a bandage to fit, make it possible?

Thanx ahead

Re: aluminum to magnesium

Posted: Sat Mar 05, 2016 7:10 pm
by BigD
Disclaimer: I don't know what I'm talking about

Before the experts chime in, I think the answer is you can't do this BUT, I've seen it done because the automotive magnesium castings aren't pure magnesium, but an alu/mag alloy. Specifically, a friend of mine welded an aluminum AN bung to a BMW M50 valve cover which is supposed to be magnesium but the weld took pretty well. If I remember right, the welder said the reason it worked is that the cover was actually an alloy.

Re: aluminum to magnesium

Posted: Sat Mar 05, 2016 10:02 pm
by big gear head
This should be interesting.

Re: aluminum to magnesium

Posted: Sat Mar 05, 2016 11:30 pm
by Rick_H
big gear head wrote:This should be interesting.
Yeah..definitely

As far as I know this is impossible, but you can buy magnesium in sheet form and weld it. Expensive but possible.http://www.hadco-metal.com/catalogue/group/177

Read this...http://www.weldingtipsandtricks.com/wel ... esium.html

Re: aluminum to magnesium

Posted: Sun Mar 06, 2016 12:07 am
by Sandow
No.

You can weld it together and it will look fine. It will have zero strength though and any jolt will break the weld. Given what it is, It is probably worth welding in magnesium with an appropriate fill rod.

https://www.youtube.com/watch?v=ElT5qmUyagU

-Sandow