FOR REQUIREMENT OF THIS GRADE
OR FOR DETAIL CONTACT US AT :-Introduction
EN 10305-1 specifies the
technical delivery conditions for seamless cold drawn steel tubes of circular
cross-section used for precision applications. The tubes are characterized by
accurately controlled dimensions, close tolerances and specified surface
roughness. The standard covers tubes with an outside diameter up to 380 mm.
EN 10305-1 tubes are
primarily precision carbon and low-alloy steel tubes rather than stainless
steel tubes. Common material grades include E215, E235 and E355. They are
widely used where dimensional accuracy, surface quality and consistent mechanical
properties are important.
Ladhani Metal Corporation
supplies EN 10305-1 seamless cold drawn tubes in required grades, sizes, wall
thicknesses, surface conditions and delivery conditions.
Applicable Standard
EN 10305-1 – Steel Tubes for
Precision Applications – Technical Delivery Conditions – Part 1: Seamless Cold
Drawn Tubes.
The standard specifies
requirements for chemical composition, mechanical properties, delivery
conditions, surface quality, dimensional tolerances, testing, inspection and
documentation.
Material Type
EN 10305-1 covers:
- Carbon Steel Tubes
- Non-Alloy Steel Tubes
- Low-Alloy Steel Tubes
- Seamless Cold Drawn Steel Tubes
- Precision Steel Tubes
Stainless steel is not the
principal material category of EN 10305-1; the standard's specified grades are
predominantly non-alloy/low-alloy precision steels.
Forms of Supply
- Seamless Cold Drawn Tubes
- Precision Seamless Tubes
- Cold Drawn Steel Tubes
- Cold Finished Tubes
- Round Tubes
- Precision Hydraulic Tubes
- Precision Mechanical Tubes
- Straight Length Tubes
- Cut-to-Length Tubes
- Custom Dimension Tubes
Grades Covered
E215 | E235 | E355
The standard also permits an
additional steel grade to be specified by agreement, subject to the
requirements given for chemical composition, mechanical properties and delivery
condition.
Grade Designation
- E215 – Engineering steel grade with
minimum yield strength of 215 MPa in the normalized condition
- E235 – Engineering steel grade with
minimum yield strength of 235 MPa in the normalized condition
- E355 – Engineering steel grade with
minimum yield strength of 355 MPa in the normalized condition
Chemical Composition
|
Grade |
C Max. % |
Si Max. % |
Mn Max. % |
P Max. % |
S Max. % |
Al Total Min. % |
|
E215 |
0.10 |
0.05 |
0.70 |
0.025 |
0.025 |
0.025 |
|
E235 |
0.17 |
0.35 |
1.20 |
0.025 |
0.025 |
— |
|
E355 |
0.22 |
0.55 |
1.60 |
0.025 |
0.025 |
— |
The standard also contains
provisions for controlled sulphur ranges for E235 and E355 when improved
machinability is required.
Mechanical Properties
Mechanical properties depend
on the delivery condition. The principal delivery conditions include cold
drawn, cold drawn and lightly cold worked, stress relieved, annealed and
normalized conditions.
|
Grade |
Tensile Strength MPa |
Yield Strength Min. MPa |
Elongation Min. % |
|
E215 |
290–430 |
215 |
30 |
|
E235 |
340–480 |
235 |
25 |
|
E355 |
490–630 |
355 |
22 |
|
E215 |
280 |
— |
30 |
|
E235 |
315 |
— |
25 |
|
E355 |
450 |
— |
22 |
For cold-drawn conditions,
tensile strength and elongation vary according to the degree of cold working.
The standard provides separate values for +C and +LC conditions.
Surface Finish
Surface quality is an
important characteristic of EN 10305-1 precision tubes.
- Cold Drawn Surface
- Smooth Precision Surface
- Bright Surface
- Fine Surface Finish
- Surface Suitable for Further
Processing
- Controlled Surface Roughness
The standard specifies
maximum surface roughness requirements and permits additional surface-roughness
requirements to be agreed between purchaser and manufacturer.
Dimensional Accuracy
EN 10305-1 tubes are
manufactured with precisely controlled:
- Outside Diameter
- Inside Diameter
- Wall Thickness
- Eccentricity
- Straightness
- Length
- Surface Roughness
Reduced or unilateral
diameter and wall-thickness tolerances can also be specified by agreement.
Standard Sizes
EN 10305-1 primarily covers
circular tubes with outside diameter up to 380 mm. Other cross-sectional shapes
can be supplied when agreed between purchaser and manufacturer.
- Outside Diameter: Up to 380 mm
- Wall Thickness: According to
diameter and manufacturing capability
- Length: Random or fixed lengths
- Inside Diameter: Controlled
according to order
- Custom Tolerances: Available by
agreement
Key Features
- Seamless construction
- Cold drawn precision finish
- Excellent dimensional accuracy
- Tight dimensional tolerances
- Controlled surface roughness
- Good concentricity
- Good straightness
- Reliable mechanical properties
- Suitable for precision components
- Suitable for hydraulic and
pneumatic systems
Applications
Automotive Industry
- Fuel-system components
- Hydraulic components
- Shock absorber components
- Steering components
- Precision mechanical parts
- Automotive tubular components
Hydraulic and Pneumatic Systems
- Hydraulic cylinders
- Pneumatic cylinders
- Hydraulic lines
- Precision pressure tubes
- Cylinder components
General Engineering
- Machine components
- Precision shafts
- Bushes
- Sleeves
- Guides
- Mechanical assemblies
Furniture and Tubular Products
- Precision furniture tubes
- Frames
- Supports
- Tubular components
Automotive, furniture and
general engineering are identified as typical fields of application for EN
10305-1 tubes.
Fabrication and Machining
EN 10305-1 tubes can be cut,
bent, formed, machined and fabricated according to the selected grade and
delivery condition.
Cold-drawn tubes supplied in
+C condition provide higher strength but have reduced formability compared with
annealed or normalized material. Where additional forming is required, an
appropriate delivery condition should be selected.
Heat Treatment
Heat-treatment conditions
covered by the standard include:
- Annealing
- Normalizing
- Stress Relieving
Cold drawing itself also
influences the final mechanical properties. Subsequent cold or hot processing
can change the mechanical properties of the tubes.
Advantages
- High dimensional precision
- Excellent surface finish
- Seamless construction
- Close diameter and wall-thickness
tolerances
- Good concentricity
- Suitable for precision machining
- Excellent suitability for hydraulic
and pneumatic components
- Multiple delivery conditions
- Suitable for automotive and
engineering components
Conclusion
EN 10305-1 seamless cold
drawn steel tubes are precision carbon and non-alloy steel tubes designed for
applications requiring close dimensional tolerances, controlled surface
roughness and reliable mechanical properties
Ladhani Metal Corporation
supplies EN 10305-1 seamless cold drawn tubes in required grades, outside
diameters, wall thicknesses, lengths, surface finishes and delivery conditions,
with mill test certificates and inspection documentation as required.
FOR REQUIREMENT OF THIS GRADE
OR FOR DETAIL CONTACT US AT :-
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