Analysis of the criticality of flaws found in trunnion of ...
Trunnion material This paper was based on a Ø 7.315 m (24 ft) × 12.192 m (40 ft) ball mill used in a typical mining plant. Some basic dimension of the studied trunnion is shown in Fig. 3. The approximate weight is 28 metric tons. The trunnion material was nodular cast iron per DIN 1693 grade GGG-50 [4] equivalent to EN-1563-GJS-500-7 [5].