Blank is 144" x 18" x 3-1/4" thk, 100 ksi yield, 115-135 ksi tensile, will be heated to 1700 deg F before bending into a half pipe. I need the tonnage required to do this job. I would appreciate it if someone could help me figure out the tonnage required and (or) point me in the right direction so I could do this calculation.