EN 10305-4 E215 E235 E355 Seamless Cold Drawn Tubes For Hydraulic And Pneumatic Power Systems
Seamless cold drawn tubes are essential components in hydraulic and pneumatic power systems, offering high precision and reliability. The EN 10305-4 standard specifies the requirements for these tubes, ensuring they meet the rigorous demands of various industrial applications. This article delves into the material specifications, key features, chemical composition, mechanical properties, steel grades, applications, and possible alternative grades of EN 10305-4 E215, E235, and E355 tubes.
Material Specification
EN 10305-4 tubes are manufactured using a cold drawing process, which enhances their dimensional accuracy and surface finish. These tubes are typically made from non-alloy and alloy steels, providing excellent mechanical properties and corrosion resistance. The standard covers three primary steel grades: E215, E235, and E355, each offering distinct characteristics suitable for different applications.
Key Features
- High Precision: The cold drawing process ensures tight dimensional tolerances.
- Smooth Surface Finish: Ideal for applications requiring minimal friction.
- Excellent Mechanical Properties: High strength and durability.
- Corrosion Resistance: Suitable for harsh environments.
- Versatility: Applicable in various hydraulic and pneumatic systems.
Chemical Composition
The chemical composition of EN 10305-4 tubes varies depending on the steel grade. Below is a table presenting the typical chemical composition for E215, E235, and E355 grades:
| Element (%) | E215 | E235 | E355 |
| C | ≤ 0.10 | ≤ 0.17 | ≤ 0.22 |
| Si | ≤ 0.35 | ≤ 0.35 | ≤ 0.55 |
| Mn | ≤ 0.70 | ≤ 1.20 | ≤ 1.60 |
| P | ≤ 0.025 | ≤ 0.025 | ≤ 0.025 |
| S | ≤ 0.025 | ≤ 0.025 | ≤ 0.025 |
| N | ≤ 0.009 | ≤ 0.009 | ≤ 0.009 |
Mechanical Properties
The mechanical properties of these tubes are crucial for their performance in hydraulic and pneumatic systems. The table below outlines the typical mechanical properties for each grade:
| Property | E215 | E235 | E355 |
| Yield Strength (MPa) | ≥ 215 | ≥ 235 | ≥ 355 |
| Tensile Strength (MPa) | 290-430 | 340-480 | 490-630 |
| Elongation (%) | ≥ 25 | ≥ 25 | ≥ 22 |
Steel Grade
- E215: Suitable for low-pressure applications where high precision is required.
- E235: Offers a balance of strength and ductility, ideal for medium-pressure systems.
- E355: High strength and toughness, perfect for high-pressure applications.
Application
EN 10305-4 seamless cold drawn tubes are widely used in:
- Hydraulic systems
- Pneumatic systems
- Automotive industry
- Construction machinery
- Agricultural equipment
- Industrial machinery
Possible Alternative Grades
Depending on specific requirements, alternative grades may be considered:
- EN 10216-2: Seamless tubes for pressure purposes.
- ASTM A519: Seamless carbon and alloy steel mechanical tubing.
- DIN 2391: Precision steel tubes.
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