On Wed, 3 Dec 2008 13:09:30 -0500, "Eisboch" wrote:

Quite a few modern naval ships have steel hulls and aluminum
superstructures. They just aren't supposed to crash into an aircraft
carrier.

You can buy strips of metal consisting of two strips, one aluminum and
the other steel, welded together with pressure from high explosives.
You weld one side to the steel, the other to the aluminum. The better
alternative to rivets.

Casady