Commonly referred to as closed-die forging, impression-die forging of steel, aluminum, and other alloys can produce an almost limitless variety of 3-D shapes that range in weight from mere ounces up to more than 50 lbs. Impression-die forgings can be produced on hydraulic presses, mechanical presses and hammers, with capacities up to 1,000 tons and 12,000 lbs. respectively.