Evaluation of some mechanical properties of steel sheet

The requirement for reducing of weight of products urges the producers to reducing thickness of used materials. It means the reducing of thickness of products from sheet. The second requirement for product is its adequate stiffness. These requirements force product manufacturers from sheet material to ask for development of sheets with higher strength properties and formability from sheet producers. The properties of sheet must guarantee deep- drawing of stampings without problems, but with required qualitative and dimensional parameters. The contribution solves the problem of deep drawing of bath tubes and pressability of steel sheets used at the production of bath tubes. The thickness of used steel sheets were changed from 1,55 mm to presented 1,35 mm. This change had an influence on the required properties of steel sheets and also the changes of technological conditions of deep drawing. The next surface finishing of pressing - bath tube requires the roughness of surface in the defined boundary.