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Carbon steel
DIN2391 EN10305-4 DIN1630
ST35 45 52 E215 235 255 355 ST37.4 ST44.4 as per request
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DIN2391 ST37.4 Honed Tube For Hydraulic Cylinder
Detailed Image:
Description:
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.
Allowable working pressures are calculated using as per DIN 2413 at normal temperature. The yield and tensile stress values utilize to determine the maximum allowable running pressure and wall thickness required. The tubes and pipes are delivered the actual yield and tensile stress values are verified from the true copy material certificates. Pressure reduction factors at various temperatures show below:
| ° C | -40 | 120 | 150 | 175 | 200 | 250 |
| ° F | -40 | 248 | 302 | 347 | 392 | 482 |
| Rating Factor | 0.90 | 1.0 | 0.89 | 0.89 | 0.83 | NA |
Conclusion:
In conclusion, DIN 2391 ST37.4 honed tubes are specifically designed for hydraulic cylinder applications, providing a smooth, uniform surface with precise dimensions and a consistent surface finish. The honing process ensures optimal sealing and reduced wear, making these tubes ideal for use in various industries, including construction equipment, industrial machinery, and automotive systems. By adhering to the DIN 2391 standard, manufacturers can ensure the quality and performance of these honed tubes, ultimately contributing to the efficiency and reliability of hydraulic systems.
If you are interested in our products, please contact our sales team.
DIN2391 ST37.4 Honed Tube For Hydraulic Cylinder
Detailed Image:
Description:
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.
Allowable working pressures are calculated using as per DIN 2413 at normal temperature. The yield and tensile stress values utilize to determine the maximum allowable running pressure and wall thickness required. The tubes and pipes are delivered the actual yield and tensile stress values are verified from the true copy material certificates. Pressure reduction factors at various temperatures show below:
| ° C | -40 | 120 | 150 | 175 | 200 | 250 |
| ° F | -40 | 248 | 302 | 347 | 392 | 482 |
| Rating Factor | 0.90 | 1.0 | 0.89 | 0.89 | 0.83 | NA |
Conclusion:
In conclusion, DIN 2391 ST37.4 honed tubes are specifically designed for hydraulic cylinder applications, providing a smooth, uniform surface with precise dimensions and a consistent surface finish. The honing process ensures optimal sealing and reduced wear, making these tubes ideal for use in various industries, including construction equipment, industrial machinery, and automotive systems. By adhering to the DIN 2391 standard, manufacturers can ensure the quality and performance of these honed tubes, ultimately contributing to the efficiency and reliability of hydraulic systems.
If you are interested in our products, please contact our sales team.
