On 2 Dec 2014 at 15:11, Tim wrote:

> On Sun, Nov 30, 2014 at 08:43:59PM -0600, Grimmund wrote:
> > Tim-  Any significant difference for just using scrap iron?  Maybe
> > with a little DU or tungsten cap?
>
> Iron is quite a bit less dense than tungsten, so less than half the
> mass (and impact energy) per unit volume.

More like 2/5ths.

Tungsten has a density of 19.3, iron is 7.8.

--
Leonard Erickson (aka shadow)
shadow at shadowgard dot com