On Mon, 08 Oct 2007 16:14:26 GMT, Trevor Jones
wrote:

Ivan Vegvary wrote:

Thanks everybody for encouraging me to take my scrap aluminum siding to the
metal scrap dealer (instead of my wife's kiln). I also have been saving
aluminum window frames, screen door frames and ladders. Are these also not
ideal for foundry work? Should I throw them on the truck?

Thanks again,

Ivan Vegvary


Suitable only for casting anything that will never be machined.

Think chewing gum. On a warm day. About as nice to machine.

Know anyone that works on cars? Aluminum cylinder heads are good
casting alloy.

If you are going to cast with scrap, learn to screen for magnesium, too.

Vinegar on a freshly scraped area of mag. turns a smutty purpleish color.

Cheers
Trevor Jones

take a piece of copper pipe and stir the puddle with it.
it will disolve into the melt quite readily.
ruff as guts and dont overdo it.
the 20xx series aluminium alloys have copper added and have
substantially improved machinability.

experiment.

Stealth Pilot