According to online news on March 4, 2024, CITIC Heavy Machinery Co., Ltd. recently successfully completed the forging operation of the world's first set of key parts of the 5600 mm rolling mill support roll forgings. There are three backup roller forgings in this batch, forged from 483 tons of steel ingots. The largest forging is 2.52 meters in diameter and 12 meters long. This is currently the largest support roller in China. The roller has a long body and a large diameter, making it extremely difficult to manufacture.