Abstract
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This work presents preliminary results from a project aimed at deriving fracture toughness correlations for an improved assessment of the structural integrity and remaining life of low alloy steel pressure equipment where susceptibility to temper embrittlement is a consideration. Room temperature K(Ic) tests, Charpy tests and small punch tests were performed on samples extracted from three different locations of a 1Cr-1Mo-0.25V wt% ex-service (136,000 h) turbine rotor in the ex-service condition. Proposed correlations for two mechanical methods are presented and discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.