Presumably we should be more familiar with the basic composition of the hydraulic cylinder, in fact, its main several components are nothing more than cylinder, piston, cylinder head, piston rod and sealing device. In practice, the output force of the hydraulic cylinder is proportional to the effective area of the piston and the pressure difference between the two sides. The cylinder plays a key role in the whole device.

Therefore, from the point of view of use, in the production of hydraulic cylinder, to ensure its resistance to pressure, wear resistance and fatigue strength and other comprehensive performance. Because it's going to be critical to the life of the whole device. Under normal circumstances, we require that the cylinder made should be able to withstand pressure within 20 MPa, and is a continuous pressure.

If it is stirred, then the requirements for its ability to withstand pressure will be higher. At the same time from the hydraulic relationship analysis, then the size of the linear pressure F1 produced by the hydraulic cylinder block is equal to the system fluid pressure 12 and the effective area of the piston A product. 

Obviously, for the hydraulic cylinder, the cylinder component plays a very important role in the linear pressure size. Therefore, the technical requirements for steel pipes are given when the cylinder is made clear limits. First of all, if the heating temperature cannot reach the phase transition temperature of the material, the basic structure of the metal material will not change when the steel tube is subjected to stress annealing treatment. 

In addition, in the process of treatment, we not only need to improve the plasticity and toughness of the cylinder tube, but also need to improve its bending strength, anti-distortion ability and anti-fatigue strength according to the actual situation. In order to ensure that the hydraulic cylinder produced can meet the requirements of the work.