Hot Stamping is the process by which steel blanks are heated, pressed into shape, and rapidly cooled to produce a more efficiently formed, stronger part. There are two main methods of hot stamping (direct and indirect), the processes of which are outlined in Figure 2. By heating up the blanks, they are more easily molded to their desired shape than other methods like cold stamping. The end product of hot stamping is a thinner, lighter piece of steel that can replace what would be a heavier, thicker part, while still increasing the relative strength of the frame. This allows manufacturers, namely in the automotive business, to either lower the
overall weight of the car, or move the weight elsewhere for stabilization. With a lighter frame, cars are able to get better gas mileage, which has evidently been a big selling point in recent years.
Hot stamped parts also come with the benefit of being safer. The process minimizes springback and generally gives the steel better crash properties. The highlighted parts in Figure 1 are most commonly hot stamped, and as shown, it is now strategically used for most of the frame. As a whole, hot stamping has allowed car manufacturers to be more creative with weight distribution and the overall design of the car frame.