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The demand for the reduction of vehicle weight advanced the development of High Strength Steels. In the 80's, Bake Hardening Steels were developed for parts which are manufactured at high stretch forming capacities, specifically utilizing the increase in strength during the paint process. At the end of the 90's, the demand for even higher strength levels led to the development of Advanced High Strength Steels, e.g. Dual Phase Steels, TRIP-Steels, Martensitic Steels or Complex Phase Steels. Since then, the portion of high strength steels in vehicle bodies has been increasing constantly. In addition to the high strength level, they also possess a remarkable bake hardening potential. Currently, this potential is not taken into consideration sufficiently. The use of Advanced High Strength Steels increases the demands on the production in dealing with these materials. Process windows, such as for welding or painting, are narrowed down further.