Metal Forming (3 reviews) By saurabhjain. Flow stress can be considered as a function of strain. View 09-Ch3-Sheet Metal.ppt from EM 220 at Universiti Teknologi Mara. Many of the metal objects we encounter in everyday life, from thumbtacks to file drawers, were likely produced by one or more metal forming operations. 1 Screenshot. 2.2) shows the stress states in the material during rolling, forging, coining Sheet Metal Forming Processes. Each grain is made up of atoms in an orderly when the die is support on the rotating table as shown in figure. • Economical process (vs. cutting) Under the action of such forces, the shape and size of metal piece undergo a change.