Electron beam welding totally annuls the classical requirements like: Same material, Same material thickness, Low heat conduction, Low content of companion elements and Low carbon content. The reason for that are the narrow deep seams and the high process speeds. Therefore, this method is not limited to standard materials but may also be successfully applied to special materials, various material combinations, thin-walled and thick-walled structures. Economic solutions are always based on designs meeting the requirements of electron beam technology since the technological advantages of electron beam engineering, weld joint testing and savings in the processing operations are combined. The clever and extremely cost-saving component design simply uses the specific features inherent to electron beam welding: Narrow weld seams due to energy input <= 1% in comparison with TIG or MAG seams - resulting in minimum shrinkage and minimum distortion Narrow heat-affected zone - permits relief of welding stresses through equalisation with the elasticity of basic material