High-strength steels are being used in more and more components subject to high cyclical stresses, such as those in the automotive industry. These are intended to achieve higher safety levels and thus represent a step toward lightweight construction. However, once these materials have been subjected to a welding process, they can only develop their high strength under static load. Due to the presence of sharp notches, which occur as a result of welding and have a negative effect on the fatigue strength, the level of fatigue strength of high-strength steel materials to be achieved is decoupled from their actual material strength. However, the currently used weld seam post-treatment processes, which are intended to increase the fatigue strength either by geometrical changes of the weld seam and/or by the introduction of compressive stresses into the boundary layers, prove to be an additional processing step which, from an economic point of view, turns out to be a cost factor that must be avoided. For this reason, possibilities are being sought to optimize the welding process for welding high-strength steel materials in such a way that a seam geometry is formed from which an increase in fatigue strength can be expected. As has been shown in previous investigations, the seam flank angle and notch radius play a particularly important role in this process. Therefore, seam flank angles > 160 ° and notch radii > 1 mm are the minimum sizes for the investigations carried out in this project.