Hot Products
- Carbon & Carbon Alloy Steel
- Stainless Steel
- Copper & Nickel Alloy
- Heat Efficiency Tubes
- Pipe Fittings
- Pipe Flanges
- Gasket, Stud Bolt &Nut
- Industrial Valves
0102030405
Welded Circular Steel Tubes EN 10296-2 for Mechanical Use - China Suppliers and Factory Solutions
Normative References
The standard refers to other EN and ISO standards for testing, dimensions, and material properties, such as:
- EN 10027 — Steel designation systems
- EN 10204 — Inspection documents
- EN ISO 377 — Sample preparation for testing
Ordering Information
When ordering tubes conforming to EN 10296-2, the following must be specified:
- Quantity (length, number of pieces, or total mass)
- Dimensions (outside diameter, wall thickness, length)
- Steel grade (e.g., E235, E355, etc.)
- Delivery condition (e.g., as-welded, heat-treated, cold-worked)
- Type of inspection and testing (e.g., destructive / non-destructive testing)
- Inspection certificate (e.g., EN 10204 3.1 or 3.2)
- Special requirements (if any, e.g., surface treatment, special tolerances)
Steel Grades and Chemical Composition
The standard covers non-alloy and alloy steel grades, including:
- Non-alloy steels: E235, E275, E355 (with specified yield strengths)
- Alloy steels: Grades with higher mechanical properties (e.g., for high-stress applications)
⚗️ Chemical composition must comply with specified limits for C, Si, Mn, P, S, and other alloying elements.
Mechanical Properties
Key mechanical properties include:
- Tensile strength (e.g., 360–510 MPa for E355)
- Yield strength (e.g., min. 235 MPa for E235)
- Elongation (varies by grade and thickness)
🔧 Mechanical properties may vary based on heat treatment condition (e.g., normalized, annealed, or as-welded).
Inspection and Testing Requirements
Tubes must undergo:
- Visual inspection (surface defects, weld integrity)
- Dimensional checks (diameter, wall thickness, straightness)
- Mechanical testing (tensile, hardness, bend tests)
- Non-destructive testing (NDT) — if specified (e.g., ultrasonic or eddy current testing)
- Hydrostatic testing — optional, if required
📋 Sampling frequency depends on batch size and customer requirements.
Tolerances
The standard defines tolerances for:
- Outside diameter (e.g., ±1% for diameters > 30 mm)
- Wall thickness (varies by manufacturing method)
- Length (for cut tubes, typically +10 mm / –0 mm)
- Straightness (e.g., max. deviation of 1.5 mm/m)
Marking and Documentation
- Mandatory marking: Manufacturer's name, steel grade, dimensions, standard number (EN 10296-2)
- Optional marking: Heat number, inspection stamp
- Delivery documents: EN 10204 3.1 or 3.2 certificate (depending on inspection level)
Surface Condition and Protection
- Tubes must be free from harmful defects (cracks, excessive scaling).
- Surface treatment (e.g., oiling, painting) may be specified.
📌 Conclusion
EN 10296-2 ensures welded steel tubes meet mechanical, dimensional, and quality requirements for engineering applications. The latest version incorporates updated testing methods and material specifications. For exact details, refer to the official standard document.
EN 10296-2 ensures welded steel tubes meet mechanical, dimensional, and quality requirements for engineering applications. The latest version incorporates updated testing methods and material specifications. For exact details, refer to the official standard document.
📩 Want to order the same? Contact us Now to send your request!
❓ Frequently Asked Questions (FAQ)
Q
What is EN 10296-2 and what does it cover?
EN 10296-2 is a European standard specifying the technical delivery conditions for welded circular steel tubes used in mechanical and general engineering purposes. It covers steel grades, chemical composition, mechanical properties, dimensional tolerances, inspection requirements, and marking guidelines.
Q
Which steel grades are available under EN 10296-2?
The standard covers both non-alloy and alloy steel grades. Common non-alloy grades include E235, E275, and E355, each with defined minimum yield strengths. Alloy grades are also available for higher-performance or high-stress engineering applications.
Q
What inspection certificate is required for EN 10296-2 tubes?
Depending on the inspection level agreed upon during ordering, either an EN 10204 Type 3.1 (manufacturer's inspection certificate) or Type 3.2 (independent third-party inspection certificate) is required. The specific type must be specified at the time of order.
Q
What are the dimensional tolerances for EN 10296-2 tubes?
Tolerances are defined for outside diameter (e.g., ±1% for diameters over 30 mm), wall thickness (varies by manufacturing method), cut length (typically +10 mm / –0 mm), and straightness (maximum deviation of 1.5 mm per meter). These ensure consistent quality across all production batches.
Q
What non-destructive testing (NDT) methods are used for these tubes?
When specified by the customer or required by application, EN 10296-2 tubes can undergo non-destructive testing methods such as ultrasonic testing (UT) or eddy current testing (ECT). These methods help detect internal or surface defects without damaging the tube. Hydrostatic testing is also available as an optional requirement.
Q
What information must be included when placing an order for EN 10296-2 tubes?
A complete order must specify: quantity (by length, number of pieces, or total mass), dimensions (outside diameter and wall thickness), steel grade, delivery condition (e.g., as-welded or normalized), required inspection type and certificate, and any special requirements such as surface treatment or tighter tolerances.