| After-sales Service: | 12 Years |
|---|---|
| Warranty: | 12 Years |
| Type: | Seamless |
| Technique: | Cold Drawn |
| Material: | Carbon Steel |
| Surface Treatment: | Varnishing |
| Samples: |
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| Customization: |
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Suppliers with verified business licenses
Audited Supplier Honed tube is ready to use for hydraulic cylinder applications without further ID processing.
The honing process involves using abrasive polishing stones and abrasive paper to remove small amounts of material, to produce extremely precise ID dimensions and improved finishes. Honed tubing is ready to use for hydraulic cylinder applications without further ID processing.
Hydraulic steel tube is designed to convey liquid fluids to among hydraulics components, fittings, valves, flanges, and other tools. It is made of material E355 (ST 52.4) or E235 (ST 37.4). These two grades have different chemical composition. This helps to control the working pressure.
| Chemical Composition (%) | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) |
| E355 (ST52.4) | ⩽ 0.22 | ⩽ 0.55 | ⩽ 1.6 | ⩽ 0.045 | ⩽ 0.045 |
| E235 (ST37.4) | ⩽ 0.17 | ⩽ 0.35 | ⩽ 1.2 | ⩽ 0.045 | ⩽ 0.045 |
Hydraulic tube is made according to DIN 2391/C (DIN EN 10305-1) or DIN 2445/2 (DIN EN 10305-4) standards and it is available in millimeters, inches outer diameter, and inches nominal bore size.
The tubes surface finishing is NBK, where the tubes are phosphate and normalized which provides corrosion resistance. It is oiled inside and outside. Normalize process creates tougher metal product. During normalizing, metals will be heated at a high temperature, and it allowed to naturally cool back down to room temperature by exposure after heating. Metals that have been through this process are more formable, harder and ductile.
Seamless Honed Tubes (Steel) with a micro-finish and highly accurate in bore size within tolerance H7 or equivalent.
Grade: ST 52, ST52.3, CK45, E355, 16Mn, STKM13C, SAE1020, SAE1026, SAE1045
Honed Tubes are ready to use for hydraulic cylinder applications without further ID processing.
Different sizes of ready to use honed tube are available.
| ID(mm) | TOLERANCE(mm) | |||
| H7 | H8 | H9 | H10 | |
| <=30 | +0.021/0 | +0.033/0 | +0.052/0 | +0.084/0 |
| 30 - <=50 | +0.025/0 | +0.039/0 | +0.062/0 | +0.100/0 |
| 50 - <=80 | +0.030/0 | +0.046/0 | +0.074/0 | +0.120/0 |
| 80 - <=120 | +0.035/0 | +0.054/0 | +0.087/0 | +0.140/0 |
| 120 - <=180 | +0.040/0 | +0.063/0 | +0.100/0 | +0.160/0 |
| 180 - <=250 | +0.046/0 | +0.072/0 | +0.115/0 | +0.185/0 |
| 250 - <=315 | +0.052/0 | +0.081/0 | +0.130/0 | +0.210/0 |
| 315 - <=700 | +0.057/0 | +0.089/0 | +0.140/0 | +0.230/0 |
This will provide long piston seal life and prevent failure of the cylinder. The tube material is selected on the basis of application & working pressure.
The seamless tube for hydraulic cylinders, obtained from high quality cold drawn tubes, available in a wide dimensional range.
| Standard | Inner Diameter(mm) | Inner Diameter Deviation(mm) | |||
| GB1801-79 | H7 | H8 | H9 | H10 | |
| 30 | 0~+21 | 0~+33 | 0~+52 | 0~+84 | |
| 30-50 | 0~+25 | 0~+39 | 0~+62 | 0~+100 | |
| 50-80 | 0~+30 | 0~+46 | 0~+74 | 0~+120 | |
| 80-120 | 0~+35 | 0~+54 | 0~+87 | 0~+140 | |
| 120-180 | 0~+40 | 0~+63 | 0~+100 | 0~+160 | |
| 180-250 | 0~+46 | 0~+72 | 0~+115 | 0~+185 | |
| 250-315 | 0~+52 | 0~+81 | 0~+170 | 0~+210 | |
| 315-400 | 0~+57 | 0~+89 | 0~+140 | 0~+230 | |
Suppliers with verified business licenses
Audited Supplier 
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