Re: Kurtsite

From: Pittsburgh Pete (metalengr_at_hotmail.com)
Date: 10/19/04 

Date: 19 Oct 2004 11:45:02 -0700

dad4lou@yahoo.com (Mark) wrote in message news:<bb60bef8.0410182006.64c0fb0e@posting.google.com>...
> Andy Dingley <dingbat@codesmiths.com> wrote in message news:<umjsm05ljjkf4jg912dgtv00iig27n9tus@4ax.com>...
> > On 13 Oct 2004 11:31:55 -0700, thefarmdog@hotmail.com (Brent) wrote:
> >
> > >Does anyone know anything about the metal Kurtsite (i think thats how
> > >its spelled). Aparently its an alloy of lead, aluminum and, zinc.
> > >Its is very wear resistant, and yet still quite slippery.
> >
> > Never heard of it by that name.
> >
> > In the twenties there were a bunch of zinc-based bearing alloys. They
> > seemed to work well, but like the early die-casting alloys they
> > suffered from impurites between the grains (lead being one culprit)
> > and disintegrated after a few years. As a result, they fell from
> > favour.
>
> It's spelled Kirksite and is common material for making molds.
> Google: Results 1 - 10 of about 666 for kirksite. (0.07 seconds)
>
> Mark

Already answered back on Oct 13th. To add a bit more, there is an MSDS
***
http://www.leadcastings.com/msds/kirksite.pdf
giving the composition as Zn with 3.9 to 4.3%Al, and 3.0 to 3.5%Cu.

The copper content is a bit higher than the 2.5 to 3.0% for the "No.2"
die casting alloy, aka AC43A or UNS Z35541, which may also loosely be
referred to as Kirksite by some.

Pittsburgh Pete

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