Originally Posted by
fietsbob
periodic table: atomic weights: Aluminum 13, Titanium 22, Iron 26.
Clever, but not terribly useful:
The actual alloys are not pure Al, Ti, and Fe.
Those are atomic, numbers, not weights. The weights are 27, 48, and 56 respectively.
The actual densities of these elements are not easy to extrapolate from either of them: 2.7, 4.5, and 7.9 g/cm.