Battelle’s two-curve method (TCM) fracture arrest predictions for X70 grade steels and higher requires a correction factor for the predictions to be accurate and useful for selecting pipe steels. The first part of this article (OGJ, Oct. 20, 2008, p. 52) examined three correction factors: Leis, Wilkowski, and Centro Sviluppo Materiali (CSM). This concluding article will show the appropriate factor to be grade-specific.BackgroundFracture initiation occurs when a flaw exists in a pressurized pipe that is the maximum size flaw for the toughness level of the pipe at the operating stress level in the pipe. A deep enough and short enough flaw will result in a stable leak when it penetrate...