The aim of this final work is to get to know the technological and functional features of steel X210Cr12 and its specific application; how it will behave in specific working conditions and the behavior of its properties and the influence of heat treatment on the material. The results of the given tests and calculations that were carried out are shown by experimental evidence in the laboratory and are presented exactly in the continuation of the paper. They are shown in the work and contacts with other materials such as polyurethane resin. The specific requirements for cutting tools were dimensional stability, production of a large number of test samples and resistance to wear and a long service life. The paper also presents the most important properties for tool steels, changing and adapting them for their application. Furthermore, the application of heat treatment and its importance, how we choose the given parameters and the behavior of the material during heat treatment, the examination of the chemical composition of the material and its comparison with other materials are listed. At the very end, a final conclusion on application was made.