[en] The purpose and technologies of production of the surface layers on the austenitic steel 1H18N9T stainless steel have been presented. The verification of usefulness of the applied technologies to increase the hardness and resistance to pitting corrosion has been done. (author)

[en] Influence of manufacturing process and heat treatment on microstructure and mechanical properties of 12% Cr heat resistance martensitic steels has been discussed. These steels are used for elevated temperatures applications like: heat and power plants, chemical and petrochemical installations. Some cases of manufacturing mistakes of steam pipelines and turbine blades had been presented. These mistakes led to imperfect microstructure resulting in reduced lifetime and insufficient reliability of installations. (author)