I use a metal cutting wheel in my 30 year old Craftsman table saw more often than I use it for wood. The wheels abraid so you will need several to cut thick, long or cast irom pieces. But, the line is straight, good welding joints, multiple angle and a professional looking piece when completed. Long or large pieces are awkward to get on the table, but for most projects a cheap garage sale table saw has done all the metal cutting I would ever want. Pipe, plate, angle, aluminum, plastic, rubber and limestone all can be cut nicely with appropriate wheels on the standard intended for wood saws. A radial arm saw ought to work well, too. Its just another form of a cut-off saw. Around my neck of the woods, this type of saw with a cast iron bed and a stand is a $50 item.