The main characteristic of metallurgical hydraulic cylinders is to withstand high pressure, high temperature, and heavy load working environments. In the metallurgical production process, hydraulic cylinders need to withstand high pressure to achieve the movement and deformation of various equipment. At the same time, metallurgical hydraulic cylinders also need to withstand high temperature environments because a large amount of heat is generated during the metallurgical process, and hydraulic cylinders need to have good high-temperature resistance performance. In addition, metallurgical hydraulic cylinders also need to have a large load-bearing capacity to meet the heavy-duty requirements of metallurgical equipment.