The laser beam welding is mainly used for joining components that needs to be joined with high welding speeds, thin and small weld seams and low thermal distortion. The high welding speeds with an excellent automatic operation and the possibility to control the quality online during the process makes the laser welding a common joining method in the modern industrial production. The application range covers finest welding of non-porous seams in medical technology to precision spot welding in electronics or the jewelry industry, to deposit welding in tool and mold-making and welding complete car bodies in automobile construction. However, new and efficient production processes are often not possible without the advantages of laser technology. Thus, diverse sheet thicknesses and qualities are turned into tailored blanks by welding and resistance spot welding is replaced by laser seams.