This paper considers the elastic-plastic stress analysis of a thin AOOH steel sheet bent around a ninety degree (90°) circular die. The positions analyzed after forming are specified as 18°, 36° and 48°. Constant contours of the effective stress and strain energy density are obtained to identify the localized regions of high distortion and dilatation are identified as the contact between the sheet and die increases with the angle of rotation. As expected, yielding would first initiate near the contact where the sheet is bent while fracture is anticipated to take place on the tension side of the sheet where volume change is the largest. The contact area increased slowly with the angle of rotation up to about 30° for the present configuration, beyond which it increased much more rapidly. This general feature of metal-forming is also reflected by the stored energy density; it increased almost linearly up to 30° of rotation and then remained nearly constant. A range of angles prevails within which most of the energy is used to form the bend in the steel and it depends on the combination of sheet material and geometry in addition to the rate of forming.