EN10305-1 E235 E355 Seamless Honed Tubes
Introduction
EN10305-1 E235 E355 seamless honed tubes are widely used in various industrial applications. These tubes are specifically designed to provide high precision and accuracy in hydraulic and pneumatic systems, making them suitable for a range of fluid power applications. This article explores the material, specification, key features, chemical composition, mechanical properties, steel grade, application, and possible alternative grades of EN10305-1 E235 E355 seamless honed tubes.
Material
EN10305-1 E235 E355 seamless honed tubes are predominantly made from carbon steel and alloy steel. These materials are chosen for their excellent mechanical properties, such as high tensile strength, good ductility, and resistance to corrosion. The selection of materials ensures the honed tubes can withstand high pressure and provide long-lasting performance.
Specification
EN10305-1 E235 E355 seamless honed tubes conform to the European standard specification for cold-drawn seamless precision steel tubes. The specification outlines the dimensional and technical requirements, ensuring the tubes meet the necessary standards for their intended applications. These tubes are precision manufactured with tight tolerances for seamless honing, ensuring superior quality and reliability.
Key Features
The key features of EN10305-1 E235 E355 seamless honed tubes are as follows:
| Feature | Description |
| Seamless Design | Seamless construction provides enhanced strength and allows for smooth fluid flow |
| Honed Interior | Precision honing ensures a high-quality, mirror-like finish, reducing friction and wear |
| High Accuracy | Tight dimensional tolerances ensure a precise fit in hydraulic and pneumatic systems |
| Good Machinability | Easy to machine and process, making them suitable for various manufacturing operations |
| Resistance to Corrosion | Excellent resistance to corrosion, enhancing the durability of the tubes |
Chemical Composition
The chemical composition of EN10305-1 E235 E355 seamless honed tubes may vary depending on the specific grade. The composition generally includes elements such as carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), and occasionally alloying elements such as chromium (Cr) and nickel (Ni).
| Element | E235 Composition (wt%) | E355 Composition (wt%) |
| Carbon (C) | 0.17 max | 0.22 max |
| Silicon (Si) | 0.35 max | 0.55 max |
| Manganese (Mn) | 1.20 max | 1.60 max |
| Phosphorus (P) | 0.025 max | 0.025 max |
| Sulfur (S) | 0.025 max | 0.025 max |
Note: The above composition is indicative and subject to specific manufacturing requirements.
Mechanical Properties
The mechanical properties of EN10305-1 E235 E355 seamless honed tubes are determined through various testing methods, such as tensile testing, hardness testing, and impact testing. These properties ensure the tubes can withstand the required loads and pressures in their respective applications.
E235 Mechanical Properties| Property | E235 Mechanical Properties | E355 Mechanical Properties |
| Tensile Strength (MPa) | 360-500 | 490-630 |
| Yield Strength (MPa) | 215 min | 355 min |
| Elongation (%) | 25 min | 22 min |
| Impact Value (J) | not specified | not specified |
| Hardness (HBW) | 115-195 | 185-225 |
Note: The mechanical properties mentioned above are based on approximate values and may vary depending on manufacturing processes and specific requirements.
Steel Grade
EN10305-1 E235 E355 seamless honed tubes are available in different steel grades, which determine their specific properties and suitability for different applications. Some common steel grades used for these tubes include:
- E235: This is a non-alloy steel grade with good ductility and weldability, suitable for general hydraulic and pneumatic applications.
E355: This is a high-strength, non-alloy steel grade with improved impact resistance, suitable for applications requiring higher pressures and heavy-duty usage.
Application
EN10305-1 E235 E355 seamless honed tubes find applications in various industries where precision tubing is essential. Some common applications include:
- Hydraulic Systems: These tubes are extensively used in hydraulic cylinders, ensuring reliable power transmission and smooth operation.
- Pneumatic Systems: The high accuracy and seamless design make them ideal for pneumatic applications, enabling efficient energy transfer.
- Automotive Industry: They are widely used in the automotive sector for shock absorbers, hydraulic cylinders, and other fluid power applications.
Machinery and Equipment: EN10305-1 E235 E355 seamless honed tubes are also utilized in machinery and equipment requiring precise fluid control and transmission.
Possible Alternative Grades
While EN10305-1 E235 E355 seamless honed tubes are commonly used, there are several alternative grades available to suit specific requirements. Some possible alternative grades include:
E410: High-strength steel with improved ductility and impact resistance, suitable for heavy-duty applications.
E235+C: This grade has improved cold-drawing characteristics, making it easier to manufacture complex shape tubes.
E355+N: A normalized steel grade with increased yield strength and impact resistance, ideal for applications requiring high strength.
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