Selected high-temperature fatigue data for AISI 304 stainless steel are analysed using the linear creep-fatigue damage rules, the frequency modified parameter method,and the method given in ASME Code Case 1331-5. The capability of each method to predict fatigue lives obtained under known testing conditions is discussed. The method of the ASME Code case which includes large safety factors, was found to be conservative. If, however, the method is used at 1050°F for cycles with long hold times,

more »

... safety factor of the resultant design may be significantly smaller than desired. The other four methods examined predicted the majority of the experimental fatigue lives within a factor of two. The linear creep-fatigue damage rule using a time ratio for creep damage appears to be superior to the others.