scope:

This bulletin presents an interpretative review of the literature and an analysis of the available data relating to the effect of long-term (nominal 10,000 hours or greater), elevated temperature exposure on the notched impact properties and the fracture toughness of austenitic steels and high nickel alloys. The chief emphasis is on the alloys, grades, and product forms of those materials accepted for use in ASME Boiler and Pressure Vessel Code construction. Publication of this report - WRC Bulletin No. 378 was sponsored by the Materials and Fabrication Division of the Pressure Vessel Research Council