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During SAE BRASIL/96 a paper was presented showing that it was possible to represent the influence of the coefficient of friction in the stamping process using numerical simulation and some results were shown where it became clear that the correct definition of the friction conditions is very important for the results reliability. It was also shown that the current practice of assuming a typical value for the coefficient of friction, independent of the lubrication conditions, can lead to imprecise results. Along the drawing operation, the blank contacts different regions of the die and for each region there are different contact conditions (contact pressure, sliding velocity, etc.). These differences can lead to friction conditions where the coefficient depends on the contact variables and the Coulomb friction model is not applicable.