E235+N Seamless Cold Drawn Tube Carbon Steel Seamless Tubes For Precision Equipment
E235+N Seamless Cold Drawn Tube: Carbon Steel Seamless Tubes for Precision Equipment
Material
E235+N seamless cold drawn tubes are a type of carbon steel tube that undergoes a specific manufacturing process to ensure high precision and quality. The "E235" designation refers to the steel grade, while the "+N" indicates that the tubes are normalized, a heat treatment process that enhances their mechanical properties and dimensional accuracy. These tubes are widely used in precision equipment due to their excellent strength, durability, and surface finish.
Specification
E235+N seamless cold drawn tubes are manufactured according to specific standards to meet the requirements of various applications. These specifications ensure that the tubes have the necessary dimensions, tolerances, and mechanical properties for precision equipment.
- Standard: EN 10305-1
- Outer Diameter: Typically ranges from 4mm to 120mm
- Wall Thickness: Typically ranges from 0.5mm to 12.5mm
- Length: Can be customized, usually up to 12 meters
- Surface Finish: Smooth, with options for further surface treatments
Key Features
- High Precision: Manufactured to tight tolerances for precise applications.
- Excellent Surface Finish: Smooth surface suitable for further processing or direct use.
- Enhanced Mechanical Properties: Normalizing process improves strength and ductility.
- Versatile Applications: Suitable for a wide range of industries and equipment.
Chemical Composition
The chemical composition of E235+N steel is crucial for its performance. The table below outlines the typical composition:
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.17 |
| Silicon (Si) | ≤ 0.35 |
| Manganese (Mn) | ≤ 1.20 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
Mechanical Properties
The mechanical properties of E235+N tubes are essential for their performance in precision applications. The table below presents these properties:
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 340 - 480 |
| Yield Strength (MPa) | ≥ 235 |
| Elongation (%) | ≥ 25 |
| Impact Energy (J) | ≥ 27 (at 20°C) |
Similar Standards and Steel Grades
E235+N tubes can be compared to similar standards and steel grades across different international systems:
- ASTM: A179, A214
- EN: E235, E355
- GOST: 8731-74, 8732-78
- JIS: G3445 STKM 11A
- GB: 699-88, 8162-99
Application
E235+N seamless cold drawn tubes are used in a variety of applications, particularly where precision and reliability are paramount. Common applications include:
- Hydraulic Systems: Used in hydraulic cylinders and systems for their strength and precision.
- Automotive Industry: Components such as shock absorbers and steering systems.
- Machinery: Precision parts in industrial machinery and equipment.
- Construction: Structural applications requiring high strength and durability.
- Energy Sector: Used in oil and gas exploration equipment.
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