EN10305-1 E355 +N Precision Seamless Steel Tube
EN10305-1 E355 +N Seamless Steel Tube is a high-quality seamless steel tube designed for precision applications. It is manufactured to meet the stringent requirements of the European Standard EN 10305-1, which specifies the technical delivery conditions for seamless cold-drawn steel tubes with a circular cross-section. These tubes are characterized by their precisely defined tolerances on dimensions and specified maximum surface roughness, making them ideal for use in various industries where precision is crucial.
Key Features
- High Precision: The tubes have tightly controlled dimensional tolerances.
- Surface Finish: They offer a specified maximum surface roughness for better performance in applications.
- Material Grade: E355 +N, which indicates a carbon steel with a minimum yield strength of 355 N/mm² and a +N modifier for nitrogen-treated steel.
- Versatility: Suitable for use in automotive, mechanical engineering, hydraulic systems, and more.
Typical Applications
- Automotive Industry: For components like transmission shafts and fuel injection pipes.
- Hydraulic Systems: For high-pressure applications requiring precision and durability.
- Structural Components: In mechanical engineering for parts that require high strength and precision.
Table of Specifications
Below is a table that outlines some of the key specifications for the EN10305-1 E355 +N Seamless Steel Tube:
Specification | Description |
Standard | EN 10305-1 |
Grade | E355 +N |
Tolerance on Dimensions | Precisely defined |
Surface Roughness | Specified maximum |
Sizes | O.D.: 6-88mm W.T.: 1-10mm L: max 11800mm |
Delivery Condition | Cold drawn, Annealed, Normalized, Quench/Tempered |
Chemical Composition | C ≤ 0.22%, Si ≤ 0.55%, Mn ≤ 1.60%, P ≤ 0.035%, S ≤ 0.035%, N treated |
Mechanical Properties | Yield Strength: ≥ 355 MPa Tensile Strength: 490-630 MPa |
Inspection and Marking
- Each tube is inspected for compliance with the specified standards.
- Tubes are marked with type, heat number, steel grade, and size.
- Additional markings such as stamping can be made upon request.
Packaging and Delivery
- Tubes are typically bundled with steel straps into hexagonal bundles.
- Bundle weights and length sorting can be adjusted as per customer request.
- Material is delivered with a Material Test Certificate (MTC) in accordance with EN 10204.
This introduction and table provide an overview of the EN10305-1 E355 +N Seamless Steel Tube, highlighting its specifications, applications, and quality assurance measures.




Tags: EN10305-1 E355 +N, Preicison steel tube, auto steel tube, EN10305-1, steel pipe, steel tubing