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Introduction
EN 10296-1 specifies the
technical delivery conditions for welded circular steel tubes made from
non-alloy and alloy steels for mechanical and general engineering purposes. It
covers electric welded, laser beam welded and submerged arc welded tubes.
Ladhani Metal Corporation
supplies EN 10296-1 welded steel tubes in required grades, outside diameters,
wall thicknesses, lengths and delivery conditions for mechanical and general
engineering requirements.
Applicable Standard
EN 10296-1 – Welded Circular
Steel Tubes for Mechanical and General Engineering Purposes – Technical
Delivery Conditions – Part 1: Non-Alloy and Alloy Steel Tubes.
The standard covers
requirements for steelmaking, tube manufacturing, chemical composition,
mechanical properties, dimensions, tolerances, inspection and testing.
Material Type
EN 10296-1 covers:
- Non-Alloy Steel Tubes
- Alloy Steel Tubes
- Welded Circular Steel Tubes
- Mechanical Engineering Tubes
- General Engineering Tubes
The welding processes covered
include electric welding, laser beam welding and submerged arc welding.
Forms of Supply
- Welded Circular Steel Tubes
- Electric Welded Tubes
- Laser Beam Welded Tubes
- Submerged Arc Welded Tubes
- Hot Finished Welded Tubes
- Cold Finished Welded Tubes
- Mechanical Tubes
- Engineering Tubes
- Precision Welded Tubes
- Cut-to-Length Tubes
- Custom Size Tubes
Grades Covered
E155 | E190 | E195 | E220 |
E235 | E260 | E275 | E295 | E320 | E355 | E370
These grades are identified
in EN 10296-1 product ranges for mechanical and general engineering
applications.
Chemical Composition
Representative chemical
composition values for commonly supplied grades are shown below. Exact limits
depend on the grade and applicable delivery condition.
|
Grade |
C Max. % |
Si Max. % |
Mn Max. % |
P Max. % |
S Max. % |
|
E155 |
0.20 |
0.35 |
0.70 |
0.045 |
0.045 |
|
E190 |
0.20 |
0.35 |
0.70 |
0.045 |
0.045 |
|
E195 |
0.20 |
0.35 |
0.70 |
0.045 |
0.045 |
|
E220 |
0.14 |
0.35 |
0.70 |
0.045 |
0.045 |
|
E235 |
0.17 |
0.35 |
1.20 |
0.035 |
0.035 |
|
E260 |
0.20 |
0.40 |
1.40 |
0.035 |
0.035 |
|
E275 |
0.13 |
0.50 |
1.50 |
0.035 |
0.030 |
|
E295 |
0.20 |
0.55 |
1.60 |
0.035 |
0.035 |
|
E320 |
0.20 |
0.55 |
1.60 |
0.035 |
0.035 |
|
E355 |
0.22 |
0.55 |
1.60 |
0.025 |
0.025 |
|
E370 |
0.20 |
0.55 |
1.60 |
0.030 |
0.030 |
For alloy steel grades,
additional alloying elements such as Cr, Mo, Ni, V, Nb and Ti are controlled
according to the particular grade.
Mechanical Properties
|
Grade |
Yield Strength Min. MPa |
Tensile Strength Min. MPa |
Elongation Min. % |
|
E155 |
155 |
290 |
26 |
|
E190 |
190 |
310 |
25 |
|
E195 |
195 |
310 |
25 |
|
E220 |
220 |
310 |
23 |
|
E235 |
235 |
360 |
23 |
|
E260 |
260 |
370 |
22 |
|
E275 |
275 |
360 |
24 |
|
E295 |
295 |
430 |
22 |
|
E320 |
320 |
470 |
21 |
|
E355 |
355 |
490 |
20 |
|
E370 |
370 |
520 |
19 |
Mechanical requirements can
vary with wall thickness, tube dimensions, testing direction and delivery
condition.
Delivery Conditions
EN 10296-1 tubes can be
supplied in suitable manufacturing and heat-treatment conditions, including:
- As Welded
- Welded and Heat Treated
- Normalized
- Normalized and Tempered
- Cold Finished
- Other agreed delivery conditions
The delivery condition is
selected according to grade and purchaser requirements.
Surface Finish
EN 10296-1 welded tubes can
be supplied with:
- Mill Finish
- Welded Surface
- Descaled Surface
- Pickled Surface
- Cold Finished Surface
- Machined Surface
- Bright Surface
Surface requirements can be
agreed according to the intended fabrication and engineering application.
Standard Sizes
EN 10296-1 tubes are
manufactured in different outside diameters and wall thicknesses.
- Outside Diameter: Approximately
21.3 mm and above depending on manufacturer and grade
- Wall Thickness: According to tube
diameter and manufacturing process
- Length: Random or fixed lengths
- Ends: Plain Ends
- Custom Dimensions: Available according
to manufacturing capability
For example, one industrial
EN 10296-1 product range lists approximately 21.3–219.1 mm outside diameter and
2.9–8.0 mm wall thickness.
Key Features
- Welded circular construction
- Good dimensional accuracy
- Suitable for mechanical engineering
- Suitable for general engineering
- Good weldability
- Good machinability
- Available in non-alloy and alloy
grades
- Suitable for fabrication
- Wide range of strength levels
- Available in different welding
processes
Applications
Mechanical Engineering
- Machine components
- Mechanical structures
- Machinery frames
- Shafts and supports
- Fabricated assemblies
General Engineering
- Engineering structures
- Equipment components
- Industrial frameworks
- Structural components
- Fabricated steel assemblies
Automotive Industry
- Automotive components
- Chassis components
- Supports
- Frames
- Tubular mechanical components
Industrial Equipment
- Machinery
- Material-handling equipment
- Conveyor components
- Equipment frames
- Mechanical supports
Fabrication and Welding
EN 10296-1 tubes are intended
for mechanical and general engineering fabrication. They can be cut, bent,
machined and welded using procedures appropriate for the particular steel
grade.
For alloy steel grades,
welding parameters should account for the alloy composition, wall thickness and
required mechanical properties.
Testing and Inspection
EN 10296-1 includes
requirements for inspection and testing, which may include:
- Chemical Analysis
- Tensile Testing
- Bend Testing
- Flattening Testing
- Drift Expanding Testing
- Leak Testing
- Dimensional Inspection
- Visual Examination
- Non-Destructive Testing
- Weld Inspection
BSI identifies dimensional
tolerances, impact testing, welding, non-destructive testing, leak tests,
flattening, bend and drift-expanding tests among the subjects covered by the
standard.
Advantages
- Reliable welded construction
- Good dimensional control
- Suitable for mechanical
applications
- Wide range of grades
- Good machinability
- Good weldability
- Available in different
manufacturing conditions
- Suitable for custom dimensions
- Economical alternative to some
seamless tube applications
EN 10296-1 vs EN 10297-1
EN 10296-1 covers welded
circular tubes, whereas EN 10297-1 covers seamless circular steel tubes for
mechanical and general engineering purposes. Therefore, the two standards
should not be treated as interchangeable simply because similar steel grades
may be available under both specifications.
Conclusion
EN 10296-1 welded circular
steel tubes are designed for mechanical and general engineering applications
where reliable welded construction, controlled chemical composition,
dimensional accuracy and suitable mechanical properties are required. The
standard covers electric welded, laser beam welded and submerged arc welded tubes
manufactured from non-alloy and alloy steels.
Ladhani Metal Corporation
supplies EN 10296-1 welded steel tubes in required grades, outside diameters,
wall thicknesses, lengths and delivery conditions, with inspection and
certification as required.
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