The use of thermal cutting processes such as oxy-fuel cutting, plasma cutting, laser cutting and water jet cutting results in different cut edge qualities. These depend on the process parameters and many other influencing factors (material, sheet thickness). The quality is characterised in DIN EN 1090 and is mainly determined by the average peak-to-valley height RZ5. In addition, a maximum permissible hardness value is required, which is often exceeded in the cutting processes used. The aim of the investigations is to define the quality of the cut edges and to check them against the requirements of the standard. For this purpose, various practical tests are necessary to characterize the cutting edges.
