EN 10305-3 E155 Seamless Precision Steel Tubes are precision tubes that are cold drawn to the EN 10305-1 standard for close dimensional tolerances, excellent surface finish and consistent mechanical performance. They are manufactured from carbon steel grades e.g. E235, E255 and E355 and have a controlled chemical composition which gives good weldability, machineability and formability. The cold drawing process increases their tensile strength, hardness and dimensional accuracy, which are suitable for the precision engineering requirements. EN 10305-1 tubes are used for various fabrication requirements and are available in addition to delivery conditions: +C, +N and +SR. Amardeep Steel produces and distributes certified EN 10305 Seamless Precision Steel Tubes and other carbon steel tubes in various diameters and
has a large stock of steel tubes available to meet OEM and industrial requirements, with full mill test certificate, and reliable international delivery.
Technical Data
Chemical Compositions of EN 10305-3 E155 Seamless Precision Steel Tubes
| Element | Maximum Limit (%) |
|---|---|
| Carbon (C) | 0.11 |
| Silicon (Si) | 0.35 |
| Manganese (Mn) | 0.70 |
| Phosphorus (P) | 0.025 |
| Sulfur (S) | 0.025 |
EN 10305-3 E155 Seamless Precision Steel Tubes Mechanical Properties
| Mechanical Property | Typical Value |
|---|---|
| Yield Strength (ReH) | ≥ 155 MPa |
| Tensile Strength (Rm) | 270 - 410 MPa |
| Elongation (A5) | ≥ 28% |
| Hardness | Controlled as per EN 10305-1 |
Equivalent Grades of EN 10305-1 E155 Seamless Precision Steel Tubes
| Standard | Approximate Grade / Description |
|---|---|
| EN | E155 |
| DIN | St 37 Precision Tube |
| BS | 6323-6 CEW 1 |
Applications and Industrial Uses of EN 10305-1 E155 Seamless Precision Steel Tubes
- Hydraulic Systems
- Fuel injection components
- Machine tools
- Pneumatic equipment
- Conveyor systems
Frequently Asked Questions
1. What are EN 10305-1 Seamless Precision Steel Tubes?
EN 10305-1 Seamless Precision Steel Tubes are cold-drawn seamless carbon steel tubes manufactured to EN 10305-1 standards. They offer high dimensional accuracy, smooth surface finish, and reliable mechanical properties.
2. What are EN 10305-1 Seamless Precision Steel Tubes used for?
These tubes are used in hydraulic systems, pneumatic equipment, automotive components, engineering machinery, instrumentation, and precision mechanical applications.
3. What is the difference between EN 10305-1 and EN 10305-3 precision steel tubes?
EN 10305-1 covers cold-drawn seamless precision steel tubes, while EN 10305-3 covers welded cold-sized precision steel tubes. EN 10305-1 offers a seamless construction, whereas EN 10305-3 is manufactured using electric resistance welding (ERW).
4. What is the difference between EN 10305-1 E235, E255, and E355?
The main difference is their mechanical strength. E235 has the lowest strength, E255 provides medium strength, and E355 offers the highest tensile and yield strength for more demanding applications.
5. What are the delivery conditions available for EN 10305-1 tubes?
EN 10305-1 tubes are commonly supplied in +CR1, +CR2, +A, +N.
6. Are EN 10305-1 Seamless Precision Steel Tubes suitable for hydraulic applications?
Yes. Their seamless construction, tight dimensional tolerances, and smooth internal surface make EN 10305-1 tubes ideal for hydraulic systems and high-pressure fluid applications.
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