[Jeff Waegelin]

I built a whole robot out of steel once, in 2002. The frame and manipulators were all steel. Granted, the whole robot was 12" tall, with a pair of 30" extending arms, and that was it, but for what we were doing it did the job and made the robot a veritable tank. It was mostly because we had steel welding capability, but not aluminum welding that year.

Since then, I've never used steel for anything outside of shafts, fasteners, or ballast.