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The turned chrome-plated rod is a finished product suitable to manufacture of single and double acting hydraulic cylinders.
| Assembly unit | Material | Process characteristics |
| Piston Rod | 40Cr | Hardening and tempering with heat treatment ,hard chrome plated,mirror polishing |
| Cylinder Barrel | 25Mn | Tempering heat treatment to anti-deformation,25Mn is more bearable than C45/C20 steel |
Barrel/rod end, Barrel/rod head | Strength steel | Forged high strength steel |
| Seal Kits | NOK, SKF | Longer life and seal effect |
| Bushing | Hardened steel or copper |
Steel Grade | Chemical composition % | |||||
C | Si | Mn | P | S | Al | |
≤ | ≥ | |||||
20# | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | / |
45# | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 | / |
Q345B | ≤0.2 | ≤0.5 | 1.00-1.60 | 0.03 | 0.03 | / |
Q345D | ≤0.2 | ≤0.5 | 1.00-1.60 | 0.03 | 0.03 | 0.015 |
25Mn | 0.22-0.29 | 0.17-0.37 | 0.70-1.00 | 0.035 | 0.035 | / |
27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | 0.035 | 0.035 | / |
ST52 | ≤0.22 | ≤0.55 | ≤1.6 | 0.025 | 0.025 | / |
SAE1026 | 0.22-0.28 | 0.15-0.35 | 0.60-0.90 | 0.04 | 0.05 | / |
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