DIN 2391 ST52 E355 High Pressure Hydraulic Tubing Seamless Carbon High Pressure Hydraulic Honed Tubing
Material, Specification, Key Features
The DIN 2391 ST52 E355 High Pressure Hydraulic Tubing refers to seamless carbon high pressure hydraulic honed tubing that is designed for applications requiring high strength and durability. This tubing is commonly used in hydraulic systems, where it is exposed to high pressure and extreme conditions.
The material specification for DIN 2391 ST52 E355 tubing is governed by the German Institute for Standardization (Deutsches Institut für Normung). It is made from high-quality carbon steel, ensuring excellent mechanical properties and reliable performance under demanding working conditions.
Key features of DIN 2391 ST52 E355 tubing include:
- Seamless construction: This tubing is manufactured without any welds or joints, ensuring its integrity and strength.
- High pressure resistance: Designed specifically for high-pressure hydraulic applications, it can withstand substantial internal pressure.
- Precision honed surface: The interior of the tubing is honed to achieve a smooth surface, reducing friction and improving fluid flow.
- Excellent dimensional accuracy: The tubing is produced with tight tolerances, ensuring consistency and compatibility with hydraulic fittings.
Chemical Composition
The chemical composition of DIN 2391 ST52 E355 tubing is essential to understand its material properties and suitability for various applications. The table below provides a breakdown of the typical chemical composition:
| Element | Composition (%) |
| Carbon | 0.22 |
| Silicon | 0.55 |
| Manganese | 1.60 |
| Phosphorus | 0.025 |
| Sulfur | 0.025 |
Mechanical Properties
The mechanical properties of DIN 2391 ST52 E355 tubing determine its strength, toughness, and suitability for high-pressure hydraulic systems. The following table presents the typical mechanical properties:
| Property | Value |
| Tensile Strength | 660 MPa |
| Yield Strength | 510 MPa |
| Elongation | 14% |
| Hardness (Rockwell C) | 68 |
Steel Grade
DIN 2391 ST52 E355 tubing falls under the steel grade ST52, which is a low-alloy, high-strength structural steel. This particular grade offers excellent mechanical properties, including high tensile and yield strength, making it ideal for hydraulic tubing applications requiring robustness and reliability.
Application
DIN 2391 ST52 E355 tubing is commonly used in a wide range of high-pressure hydraulic applications, including:
- Hydraulic cylinders: The tubing is ideal for manufacturing hydraulic cylinders due to its high strength, pressure resistance, and honed surface finish.
- Hydraulic systems: It is used in hydraulic systems that require seamless tubing capable of withstanding heavy loads and extreme pressure conditions.
- Automotive industry: The tubing can be found in various automotive components, such as steering systems, suspension systems, and brake systems.
- Industrial machinery: It is also widely utilized in industrial machinery, such as hydraulic presses, lifts, and machine tools.
Possible Alternative Grades
While DIN 2391 ST52 E355 tubing offers exceptional performance, there are alternative grades that can be considered for specific applications. Some possible alternatives include:
- ASTM A519 Grade 1026: This carbon steel tubing provides similar properties to ST52, suitable for hydraulic systems operating under high pressure.
- DIN 17121 Grade St52-3: Another alternative grade that offers good strength and high pressure resistance in hydraulic applications.
- ASTM A106 Grade B: Although primarily used for high-temperature applications, it can also be used as a substitute for ST52 in certain high-pressure hydraulic systems.
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