You can flex steel quite a bit before it lets go, and it tends to do so slowly, aluminum can't handle fatigue that well and then just snaps off suddenly. Steel is just more "tough". I think if you get into really exotic aluminum and castings you can get a lot more out of it, but for general fabricators, it's probably not the way to go, to many possibilites for something to go wrong or just let go.
Jason
|