This report provides an evaluation of the consistency of the stress allowable in ASME Subsection NH - Class 1 Components in Elevated Temperature Service (ASME III-NH) with the ASME Section II Part D (ASME II-D) values for each of the materials currently covered by ASME III-NH and reviews the availability of the original and augmented databases for the materials. The report also analyzes the expanded databases and recommends actions to meet the needs for setting allowables over the range of temperatures and times of interest to the Generation IV reactor concepts.