It is noted that the traditional process for obtaining of aluminum alloys sheet metal is associated with semi-continuous casting of thick billets and their subsequent hot rolling. The first hot rolling pass is characterized by low reduction, which leads to strain localization in the surface layers of the metal. The finite element modeling of the first pass is performed and the stress-strain state is determined. It is found that the degree of deformation in the surface layer is approximately an order of magnitude higher than the value calculated through the total compression of the strip. At the center of the band, the deformations are practically equal to zero. Two zones along the length of the strip are revealed, in which the penetration depth of the deformation is additionally reduced. They are located at a distance from the ends of the strip, approximately equal to half of its thickness. The stress intensity is distributed quite uniformly over the thickness, but the average normal stress is distributed sharply unevenly over the thickness and is compressive near the surface and tensile in the center of the strip. This can provoke an increase in porosity, or the appearance of internal ruptures.