fatigue failure fatigue failure Dr. Reliable (Mechanical) (OP) 27 Jul 17 05:51 can a SN curve for 422SS be used for 410SS ? RE: fatigue failure gravityandinertia (Structural) 28 Jul 17 14:03 The accuracy of any analysis is dependent on the quality of the data. Can it be used? Yea. Will it introduce error? Yea. How much? Who knows. That's the problem.