HIGH-TEMPERATURE CREEP AND TENSILE DATA FOR PRESSURE-VESSEL STEELS SA533B1 AND SA508-CL2

Steel materials, SA533B1 and SA508CL-2, are widely used in the constru ction of commercial reactor pressure vessel lower heads. Previously, k nowledge of the high temperature structural properties of SA533B1 was limited to temperatures below 922 K. In support of severe accident con dition analyses, tensile and creep tests in the temperature range 900- 1473 K were performed at the Idaho National Engineering Laboratory (IN EL) under the US Nuclear Regulatory Commission Lower Head Failure Anal ysis Program. These creep and tensile test data are discussed and comp ared with previously developed lower temperature data for SA533B1 mate rial. There is also additional discussion of SA508CL-2 creep data prev iously developed at the INEL.