EN 10305-1 E195 Seamless Precision Steel Tubes are cold-drawn seamless tubes designed for high dimensional accuracy, smooth surface finish and high quality mechanical performance for use. The tubes are made of low-carbon E195 steel with controlled concentrations of carbon, manganese, phosphorus and sulfur and are extremely weldable, formable and machinable. They are manufactured to rigorous quality and tolerance standards and are usually supplied with inspection documentation as defined by EN 10204 and conform to EN 10305-1. The material possesses a tensile strength of 320-440 MPa, with good elongation characteristics, making it a durable material for use in harsh environments. The tubes are widely used in automobile, hydraulic, pneumatic, machinery making, furniture making and all other engineering industries. At usapipingsolution, we source seamless precision steel tubes with high quality that meet international standards and industry requirements under E195 code of EN 10305.
Specifications of EN 10305-1 E195 Seamless Precision Steel Tubes
| Parameter | EN 10305-1 Specific Value / Requirement |
|---|---|
| Standard | EN 10305-1:2016 |
| Manufacturing Method | Cold-drawn seamless |
| Outer Diameter (OD) Range | 4 mm to 120 mm (stock) | up to 380 mm on request |
| Wall Thickness Range | 0.5 mm to 20 mm |
| Delivery Conditions | +C (Hard), +LC (Soft), +SR (Stress Relieved), +A (Annealed), +N (Normalized) |
| Surface Finish | As-drawn | Honed bore (SRB) available on request |
| Inspection Documentation | EN 10204 3.1 Mill Test Certificate (MTC) standard; 3.2 on request |
| Non-Destructive Testing (NDT) | Per EN ISO 10893 series |
| Approved Manufacturers | All EN 10305-1 E355 tubes are sourced from mills holding ISO 9001 and EN 10305-1 product certification. Mill test certificates issued per EN 10204 3.1. Third-party 3.2 inspection available from BUREAU VERITAS, SGS, or TÜV on request. |
Equivalent Grades of EN 10305-1 E195 Seamless Precision Steel Tubes
| Standard Category | British (BS) | German (DIN) | European (EN) | Chinese (GB) | American (ASTM) |
|---|---|---|---|---|---|
| Designation / Code | BS | DIN | BS EN 10305-1 DIN EN 10305-1 | DIN 2391 | GB/T 3639 |
Different Types of EN 10305-1 Precision Steel Tubes
Testing, Inspection, and Dimensional Requirements of EN 10305-1 Precision Steel Tubes
EN 10305-1 precision steel tubes are produced with respect to quality requirements and tested under different types of tests to guarantee mechanical reliability and dimension. When the wall thickness of the tube is less than 15% of the outside diameter, the tube is placed between parallel plates and compressed, and when it reaches the required distance, it is checked for cracks and flaws during the flattening test. In compliance with EN ISO 8493, the increasing drift test is carried out with the benefit of a 60 ° conical mandrel to demonstrate the expansion capacity of the tube and applies to tubes with an outer diameter of less than 150 mm and a wall thickness of less than 10 mm. Flattening and drift expanding tests are recommended but not required, unless specified, and are typically performed in addition to the tensile test.
The non-destructive testing (NDT) of the products can be used in compliance with the relevant EN ISO 10893 testing methods to ensure product integrity. An approved non-destructive inspection procedure is also used to conduct leak tightness verification. The seamless steel tubes specified in EN 10305-1 have outer diameters of up to 380 mm and must have very precise dimensions and a controlled surface roughness. The outside diameter, inside diameter and wall thickness may be affected by specific tolerances depending on delivery condition, to guarantee quality consistency and performance in precision engineering applications.
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Applications Uses of EN 10305-1 Precision Steel Tubes
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Frequently Asked Questions:
What is the difference between EN 10305-1 and DIN 2391?
EN 10305-1 is the newer European standard that replaced DIN 2391. Both cover seamless precision steel tubes, but EN 10305-1 provides updated requirements, testing methods, and steel grades.
What do the delivery conditions +C, +LC, +SR, +A, and +N mean in EN 10305-1?
+C – Cold drawn/hard condition with high strength. +LC – Cold drawn/soft condition with improved formability. +SR – Stress relieved after cold drawing to reduce internal stresses. +A – Annealed condition for maximum ductility. +N – Normalized condition for balanced strength and toughness.
What is the difference between EN 10305-1 and EN 10305-2?
EN 10305-1 covers seamless cold-drawn precision steel tubes, while EN 10305-2 covers welded cold-drawn precision steel tubes.
What are the mechanical properties of EN 10305-1 Grade E235 and E355?
E235 offers a minimum yield strength of approximately 235 MPa, while E355 provides a higher minimum yield strength of approximately 355 MPa, making E355 suitable for more demanding hydraulic and engineering applications.
Can EN 10305-1 precision steel tubes be bent or flared without cracking?
Yes, EN 10305-1 precision steel tubes can be bent, flared, and formed without cracking when supplied in suitable delivery conditions such as +A (annealed) or +N (normalized).
Mill-certified stock. EN 10305-1 E195 compliance. OD 4 to 120 mm. Full MTR documentation.
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