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The paper concerns predicting the fatigue life of the material 35NCD16(36NiCrMo16) under random loading. High alloy steel 35NCD16 characterized by alack of mutual parallelism of fatigue characteristics for extension and torsion. For suchmaterials the fatigue life estimation, standard models shoul not be used, because theydo not take into account the variability relative to the tangential and normal stress. Theaim of the work is to compare the experimental results of the calculation using theproposed model obtaining satisfactory results.