Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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EN10305 E235+N 1.0308 Carbon Steel Seamless Boiler Tube
The EN10305 E235+N seamless tube is a precision-engineered steel tube designed for high-performance applications, adhering to the European standard EN 10305.
Part of a series covering cold-drawn seamless steel tubes for hydraulic, pneumatic, and mechanical systems.Specifies strict dimensional tolerances, mechanical properties, and testing methods to ensure reliability in critical applications.
E235: Denotes a minimum yield strength of 235 MPa, comparable to grades like S235JR. This ensures structural integrity under stress.
+N: Indicates the steel is normalized (heated above critical temperature and air-cooled). This process enhances Grain refinement for uniformity.Improved toughness and ductility. Better machinability and resistance to deformation.
This Tube have Seamless Construction.Manufactured without welds, eliminating weak points and enhancing Pressure resistance (ideal for high-pressure hydraulic/pneumatic systems).Corrosion resistance and longevity in demanding environments.
| Yield Strength | Tensile Strength | Elongation A5 min | |||
| MPa min | ksi min | MPa min | MPa min | ksi min | Percentage |
| 490 | 630 | – | 22 | ||
| DIN | EN | BS | NFA | ASTM | ASME |
| – | EN 10305-1 Grade E355 | – | – | – | – |
| Mandatory | Chemical analysis | M | M |
| Tensile testing | M | One per tested batch | |
| Dimension verification | M | M | |
| Visual inspection | M | M | |
| Optional | Flattening test or expansion test (option 20) | M | One per tested batch |
| Roughness measurement | Not applicable | One per tested batch | |
| NDT in order to identify longitudinal discontinuity | Not applicable | Individual | |
| NDT in order to identify leaks |
Application
1. Hydraulic and Pneumatic Systems
Cylinders and Actuators: Can be used in hydraulic/pneumatic cylinders due to its high pressure resistance and seamless structure, preventing leakage under cyclic loads.
Valve bodies and manifolds: Its ultra-smooth inner surface ensures smooth fluid flow, minimizing turbulence and wear.
High-pressure lines: Suitable for hydraulic power units, construction machinery (such as excavators), and industrial presses.
2. Automotive and Transportation
Fuel Injection Systems: Can withstand high-pressure fuel delivery in modern diesel and gasoline engines.
Steering and Braking Systems: Used in hydraulic brake lines and power steering systems to ensure durability and safety.
Exhaust and Turbocharger Components: Resist mechanical stress and vibration in high temperature environments (with appropriate coatings).
3. Industrial Machinery
Fluid Power Systems: Deployed in CNC machine tools, injection molding equipment, and robots for precise fluid control.
Material Handling: Conveying systems, hydraulic lifts, and forklifts benefit from its strength-to-weight ratio.
Tooling and Dies: For jigs, fixtures, and molds where dimensional accuracy and rigidity are critical.
4. Energy and Infrastructure
Renewable Energy: Hydraulic pitch systems in wind turbines or hydraulic accumulators in solar tracking systems.
Oil and Gas: Instrumentation lines, control systems, and low-pressure hydraulic applications (non-corrosive environments).
Construction: Scaffolding, support structures, and hydraulic systems in cranes/drilling rigs.
5. General Engineering and Manufacturing
Precision Shafts and Bushings: Machined into components that require tight tolerances and wear resistance.
