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What material is the hydraulic cylinder piston rod made of?

1 Answers

GiselleFitz

07/30/25 5:06am

The material of the hydraulic cylinder piston rod is 45# steel, which undergoes quenching and tempering treatment. After turning and grinding, the surface is chrome-plated with a thickness of 0.03 to 0.05mm. The piston rod is a connecting component that supports the piston's work. It is mostly used in the moving parts of hydraulic cylinders and pneumatic cylinders, and is a frequently moving part with high technical requirements. Taking the hydraulic cylinder as an example, it consists of: cylinder barrel, piston rod (cylinder rod), piston, and end cover. The processing quality of the piston rod directly affects the service life and reliability of the entire product. The processing requirements for the piston rod are high, with a surface roughness requirement of Ra0.4 to 0.8um, and strict requirements for concentricity and wear resistance. The working mode of the piston rod is reciprocating motion. To increase the service life of the piston rod and reduce wear, the blank is made of 38CrMoAlAn alloy structural steel. According to the processing accuracy requirements of each part in the part drawing, the dimensional tolerance grade of the forging is 8-12. The piston rod is produced in small batches, and a cylindrical blank is considered.

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