I've cut 1/4", 5/8" and 1" steel plate without problems. Saturday I put a piece of 1/16" sheet steel on the table and the torch won't go down and touch it to set the height. It drops to the same height as for 1/4", fires then quits.
It's not a mechanical issue, it can go down all the way to the tops of the slats and I'm using a water table. The THC is the newer one with the blue screen.