Abstract
P92 (X10CrWMoVNb9-2) is commonly used for high-pressure elements of modern power units for supercritical steam parameters. As a result, steel is characterized by good strength, corrosion and creep resistance properties at elevated temperatures.
 Welded joints of pressure elements of steam boilers are potentially the weakest points in assessing their service life. Therefore, they are a place where, during long-term operation, the continuity of the material within the weld, usually in the heat-affected zone, may be lost. Therefore, material studies of welded joints on the base material contribute to the understanding of degradation processes.
 The paper presents microstructure and hardness testing of P92 welded joint after 5000h of annealing at 600 and 650°C. The hardness of the material was compared to the microstructure images in the initial state and after annealing. A scanning electron microscope carried out the microstructure tests.
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