On Wed, 23 Apr 2008 06:49:03 -0700 (PDT), Tim Shoppa
wrote:

I'm looking for something even denser than lead. Ideally I'd like to
fill up a small can, about pint-size, with scrap metal and get a
weight close to 10kg (22 pounds). I might not make 22 pounds but if I
could just get most of the way there it'd be good.

http://www.eaglealloys.com/t-tungs_alloysheavy.aspx

circa 8 kg per pint, not quite the desired 10.

Iridium and osmium would meet the spec of 10 kg/pint but they're a
bit pricey -- around $400/troy oz. 10kg is 321 troy oz, about
$128,400 worth. Still, it's heavier than gold at less than half the
price, heckuva deal!