
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.





TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and
trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and
credibility among domestic and foreign customers.
The company's production plant covers an area of over 10,000 square meters, with an annual production
capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which can satisfy customers' personalized needs for raw materials in terms of diversity and timeliness.
The group holds shares in more than ten domestic production entities, whose main products include
seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.
Over the past 30 years, the company has been gradually developing new technologies and materials to meet
the growing needs of customers and various diversified needs, exporting to more than 56 countries and still
increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.






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