The cast iron used for the wear tests is often applied in the cement industry as segments for vertical roller mills [3]. The wear mechanism of these parts was studied by Jensen et al. [3] and it was found to be a combination of high stress abrasion and gouging. Cross sections of worn cast iron parts from industrial mills were also studied and it was found that microcrack formation occurred on Cr carbides below the surface. The Cr carbide failures observed by Jensen et al. are similar to microcracks that were found on cross sections of cast iron samples after CT testing, see Fig. 10d. In combination with the other results presented, this suggests that the CT test is more suitable than the G65 test for simulating abrasive wear on parts subjected to the high contact pressures and high stress abrasion that are found in vertical roller mills and similar types of crushing equipment. For both wear tests, the highest volume loss was measured for the martensitic steel. The low abrasive wear resistance can be explained by the absence of hard phases. Without any hard phases, the abrasive is able to indent deeper into the martensitic steel than the other materials and the result is increased abrasive wear.