Yesterday I visited the Arizona Mining and Mineral Museum, in Phoenix. Outside the building there is the bucket from a shovel used at the copper mine in Ray, Arizona. The plaque said that this bucket is a single casting, weighing 100,000 pounds. To keep pace with the increased size of the ore trucks, it was replaced by a larger bucket several years ago. The new bucket was made from welded steel plates.
It must have been a major undertaking, transporting this casting to the museum, and unloading it.
Is this 50-ton hunk the largest casting you have ever heard of?