shows that most of the CFCG tested at 600°C to 625°C fall within the CCG P91 scatter band data for this
temperature range. A linear cumulative rule approach has been used to predict the CFCG experimental result by
considering the frequency effect. The data has been found to be relatively consistent with the prediction lines. An
intergranular fracture surface was observed for all CFCG tests examined with a frequency of less than 0.002
indicating that the fracture process is creep dominant.