[en] Effect of deformation ageing and saturation with hydrogen on the strength of steels St3, 45, U8A is studied. Ultimate strength and the limit of yield for steels, saturated with hydrogen, with the temperature growth from 40 deg C to 300 deg C changes to a higher degree than in steels unsaturated with hydrogen. The deformation of the investigated steels deteriorates their plasticity and changes the character of their macroscopic destruction. For the steels the optimum regime of ageing is recommended being as follows: heating up to 300 deg for 60 min