[en] The trial bodies were made of CrMoV steel used for reactor pressure vessels. The bodies were loaded with cyclic repeated stress over a period corresponding to approximately 50, 75 and 98% of the total time to fracture at corresponding stress. Following cyclic stress a sharp surface crack was formed in the trial bodies by high-cycle bending stress. In order to induce artificial deformation aging, the trial bodies were exposed to a temperature of 350 degC for a period of three hours; cooling took place in the air. Values of residual strength are graphically represented for trial bodies affected in different ways by high-deformation strain. The significant effect of the previous high-deformation cyclic strain on the residual strength of bodies with surface cracks was not manifested. The experiments took place at a temperature of 293K. (J.P.)