[foamcutter]

Okay Guys,
Is there a good way to tell the difference in Aluminum or Magnesium scrap? I think I have aluminum but I'm not totally sure. I bought some transmission tails and valve covers the scrap place said were aluminum. I just would like to know if there is an easy way for me to tell the difference. Thanks for the help Ron

[Alan T.]

Magnesium is "HIGHLY FLAMIBLE" carefully take a small piece and hit it with a torch. If its Magnesium it will "Caution, very, quickly burn.

Aluminum will not react to simple flame, it will only melt with enough direct heat.

Alan T.

[Rekd]

Magnese will feel more 'brittle' than alum, and will be 30% lighter.

And will burn..

'Rekd

[Rekd]

BTW, if the tranny tails are off a VW, it's magnese..

'Rekd

[lsfoils]

Ya, it'll burn very hot and water will not put it out! Make sure you are in a well ventilated out doors type area and don't look at it burn.... it'll leave spots on your eyes for day and may cause perm eye damage.

[ToyMaker]

lsfoils wrote:
<<...and water will not put it out! >>

In Navy fire fighting training they told us that water on burning mag would cause an explosion. Something about the chemical reaction producing hydrogen. The "only" way to extinguish it is smothering.

robotic regards,

Tom
= = = = =
"Time's fun when you're having flies."
- - Kermit the Frog

[lsfoils]

Ya, I remember this being described as one of the ways to "burn" water. It gets so hot that the water molecule "cracks" into its basic elements, oxygen and hydrogen....

[foamcutter]

Thanks to all for the suggestions. I can cut a small piece off with a saw and test it with the torch on a sand pile. I just sometimes don't feel comfortable taking the word of a guy in a scrap place I don't know, especially with something like this that could cause lots of damage if I get it wrong. Some call me paranoid, I like to call it being able to live to a ripe old age. Thanks Ron

[Rekd]

Don't consider yourself paranoid. There's a very thin line between brilliant and stupid, as well as success and failure. Caution is mandatory.

'Rekd

[lsfoils]

Hi Matt,

Maybe this would be a good time to suggest a Safety Forum...

[Alan T.]

Good suggestion. A safety forum is a great idea. I have never machined Magnesium but I did use a bar of it years ago. We shaved tiny slivers of it off the bar and used to build fires when camping. The only way to kill a piece of burning Mag. is to throw dirt on it and smother it out. Water is a definate no=no.

Alan T.

[Rekd]

GREAT idea! I'll set one up tonite.

Thanks!

'Rekd

[hardmill]

WOW!!!!!!
That one just slipped past us all.
Great idea!!

PEACE

[foamcutter]

Wow,
This is cool, a group of people who think like I do, safe is better, thinking ahead is good. Glad I could ask a question that inspired a new forum that was needed. Ron

[hardmill]

Were all here. To help and be helped.


PEACE

[Rekd]

Originally posted by lsfoils
Hi Matt,

Maybe this would be a good time to suggest a Safety Forum...

Done!

[Hobbiest]

Don't ignit magnesium! If you haven't already anyway. It will not be put out by any means other than the exhaustion of fuel. Sand only makes it a little less dangerous. There is a chemical that you can buy from the pharmacy, you put a couple of drops on the material and if it turns grey it is mag. I'll try to find the info on it if anyone is still interest...still has any skin.

[foamcutter]

Hobbiest,
That would be good information to know. If you remember what chemical it is please post it. Thanks Ron

[Hobbiest]

Here is the info for telling whether aly or mag. Magnesium is distinguished from aluminum by the use of a silver nitrate solution. The solution does not react with aluminum, but leaves a black deposit of silver on magnesium. Magnesium is produced in large quantities from sea water. It has excellent machinability, but special care must be used when machining because of its low kindling point. Knew I'd find it sooner or later!

[foamcutter]

Hobbiest,
Thanks for the info.
Ron