I have quite a few stainless steel sheets about 1/8" thick about 18" x 24" in size. These sheets were used in plastic blow molding. These sheets are like spring steel, extremely hard to cut or drill. Drilling 1/8" holes with HSS bits, the bit needed sharpening every two holes. I tried a carbide tipped masonry bit but the tips breaks at the end of the hole. A solid carbide spade bit also broke. When cutting with an acetylene torch, the metal melts in a pool and drops through leaving a jagged edge. Grinding produces small particles flying all over the place. This metal is practically unworkable. I would like to cut this in 3" strips and bend in a circle and weld a plate on the top for covering water sprinkling valve boxes. Is there anyway for me to do this?