Abstract
This paper examines elevated-temperature materials behavior through two perspectives: that of component designers/stress analysts and developers of elevated-temperature design criteria. It explores challenges in design and structural integrity evaluation, focusing on how elevated temperature design criteria originally developed for nuclear components can be adapted for non-nuclear power and petrochemical applications, particularly those under cyclic loading conditions. A central challenge lies in extrapolating from limited specimen data—gathered under specific time periods, loading conditions, and geometries—to predict behavior in complex structures subjected to variable short-term and long-term loading patterns. The paper concludes by proposing a pathway for developing elevated-temperature design criteria specifically for power and petrochemical plant components operating cyclically in the creep regime.
