Prediction of long-term rupture strength of heat resisting metallic materials

With the use of fractional dependence on stress a new relation for long-term rupture strength is proposed. It allows one to predict long-term strength in the range of structurally stable deformation using the less number of determined parameters with a sufficient accuracy. A substantiation of the the efficiency of technique proposed compared to available methods is given. Large amount of experimental data is analyzed, in particular, heat resisting steels and alloys widely used in nuclear power engineering (Kh20N45M4, Kh16N15M3B, Kh18N10T, Kh18N9 etc)