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Introduction
EN
10297-1 specifies the technical delivery conditions for seamless circular steel
tubes manufactured from non-alloy and alloy steels for mechanical and general
engineering purposes.
These
tubes are selected for applications requiring controlled chemical composition,
mechanical properties, dimensional accuracy and reliable performance in
fabricated and machined components.
Ladhani
Metal Corporation supplies EN 10297-1 seamless circular steel tubes in required
grades, dimensions, wall thicknesses, lengths and delivery conditions.
Applicable Standard
EN
10297-1 – Seamless Circular Steel Tubes for Mechanical and General Engineering
Purposes – Technical Delivery Conditions – Part 1: Non-Alloy and Alloy Steel
Tubes.
The
standard covers requirements relating to steelmaking, chemical composition,
mechanical properties, heat treatment, dimensions, tolerances, testing and
inspection.
Material Type
EN
10297-1 covers:
- Non-Alloy
Steel Tubes
- Alloy
Steel Tubes
- Seamless
Circular Steel Tubes
- Mechanical
Engineering Tubes
- General
Engineering Tubes
- Machine-Building
Tubes
Forms of Supply
- Seamless
Circular Steel Tubes
- Hot-Finished
Seamless Tubes
- Cold-Finished
Seamless Tubes
- Cold-Drawn
Tubes
- Precision
Seamless Tubes
- Mechanical
Tubes
- Engineering
Tubes
- Round
Seamless Tubes
- Cut-to-Length
Tubes
- Straight
Length Tubes
- Custom
Dimension Tubes
Grades Covered
E235
| E275 | E355 | E420 | E590 | C35E | C45E | C55E | C60E | 25CrMo4 | 34CrMo4 |
42CrMo4 | 25CrMoS4 | 42CrMoS4 | 30CrNiMo8 | 34CrNiMo6
The
exact grade availability depends on the applicable edition of EN 10297-1 and
the ordered product.
Grade Designation
- E
= Engineering steel designation
- 235,
275, 355, 420, 590 = Minimum yield-strength class where applicable
- C35E,
C45E, C55E, C60E = Non-alloy special steels
- CrMo
= Chromium-molybdenum alloy steel
- CrNiMo
= Chromium-nickel-molybdenum alloy steel
- S
= Sulphur-controlled variant where included in the designation
Chemical Composition
Representative
chemical composition values for commonly specified grades are shown below.
|
Grade |
C % |
Si Max. % |
Mn % |
P Max. % |
S Max. % |
Cr % |
Mo % |
|
E235 |
≤0.17 |
0.35 |
0.40–1.20 |
0.030 |
0.035 |
— |
— |
|
E275 |
≤0.20 |
0.40 |
0.50–1.50 |
0.030 |
0.035 |
— |
— |
|
E355 |
≤0.22 |
0.55 |
1.60 |
0.030 |
0.035 |
— |
— |
|
C35E |
0.32–0.39 |
0.40 |
0.50–0.80 |
0.025 |
0.035 |
— |
— |
|
C45E |
0.42–0.50 |
0.40 |
0.50–0.80 |
0.025 |
0.035 |
— |
— |
|
C55E |
0.52–0.60 |
0.40 |
0.60–0.90 |
0.025 |
0.035 |
— |
— |
|
C60E |
0.57–0.65 |
0.40 |
0.60–0.90 |
0.025 |
0.035 |
— |
— |
|
25CrMo4 |
0.22–0.29 |
0.40 |
0.60–0.90 |
0.025 |
0.035 |
0.90–1.20 |
0.15–0.30 |
|
34CrMo4 |
0.30–0.37 |
0.40 |
0.60–0.90 |
0.025 |
0.035 |
0.90–1.20 |
0.15–0.30 |
|
42CrMo4 |
0.38–0.45 |
0.40 |
0.60–0.90 |
0.025 |
0.035 |
0.90–1.20 |
0.15–0.30 |
|
30CrNiMo8 |
0.26–0.34 |
0.40 |
0.30–0.60 |
0.025 |
0.035 |
1.80–2.20 |
0.15–0.30 |
|
34CrNiMo6 |
0.30–0.38 |
0.40 |
0.50–0.80 |
0.025 |
0.035 |
1.30–1.70 |
0.15–0.30 |
Exact
chemical limits depend on the grade and applicable material specification.
Mechanical Properties
Mechanical
properties depend on the grade, tube dimensions and delivery condition.
|
Grade |
Yield
Strength Min. MPa |
Tensile
Strength MPa |
Elongation
Min. % |
|
E235 |
235 |
360–510 |
25 |
|
E275 |
275 |
410–560 |
21 |
|
E355 |
355 |
490–630 |
20 |
|
C35E |
Grade and condition dependent |
Grade and condition dependent |
Grade and condition dependent |
|
C45E |
Grade and condition dependent |
Grade and condition dependent |
Grade and condition dependent |
|
C55E |
Grade and condition dependent |
Grade and condition dependent |
Grade and condition dependent |
|
25CrMo4 |
Condition dependent |
Condition dependent |
Condition dependent |
|
34CrMo4 |
Condition dependent |
Condition dependent |
Condition dependent |
|
42CrMo4 |
Condition dependent |
Condition dependent |
Condition dependent |
For
heat-treated alloy steels, mechanical properties are strongly dependent on tube
size and delivery condition.
Delivery Conditions
EN
10297-1 seamless tubes can be supplied in different delivery conditions
according to grade and order requirements.
- Hot
Finished
- Cold
Finished
- Normalized
- Normalized
and Tempered
- Quenched
and Tempered
- Annealed
- Stress
Relieved
The
appropriate delivery condition is selected according to the grade and final
application.
Surface Finish
EN
10297-1 tubes can be supplied with:
- Hot-Finished
Surface
- Cold-Drawn
Surface
- Bright
Surface
- Pickled
Surface
- Descaled
Surface
- Ground
Surface
- Machined
Surface
Surface
requirements can be specified according to the purchaser's dimensional and
fabrication requirements.
Standard Sizes
EN
10297-1 seamless circular tubes are available in a broad range of outside
diameters and wall thicknesses.
- Outside
Diameter: According to order
- Wall
Thickness: According to grade and manufacturing process
- Length:
Random or fixed
- End
Finish: Plain Ends
- Custom
Dimensions: Available subject to manufacturing capability
Key Features
- Seamless
circular construction
- High
dimensional accuracy
- Good
mechanical strength
- Good
machinability
- Suitable
for heat-treated components
- Available
in non-alloy and alloy steel grades
- Good
fatigue performance for suitable grades
- Suitable
for demanding mechanical applications
- Wide
range of dimensions and delivery conditions
Applications
Mechanical Engineering
- Machine
components
- Shafts
- Bushes
- Sleeves
- Cylinders
- Rollers
- Mechanical
supports
Automotive Industry
- Drive
components
- Axle
components
- Steering
components
- Transmission
components
- Hydraulic
components
Hydraulic and Pneumatic Systems
- Hydraulic
cylinders
- Pneumatic
cylinders
- Pressure
components
- Precision
tubular components
Industrial Equipment
- Machinery
components
- Equipment
frames
- Mechanical
assemblies
- Power-transmission
components
- Fabricated
engineering components
Fabrication and Machining
EN
10297-1 seamless tubes can be machined, cut, formed and fabricated using
processes appropriate to the selected grade.
Carbon
and alloy steel grades such as C45E and 42CrMo4 are commonly selected where
machining and subsequent heat treatment are required. Alloy grades require
appropriate control of cutting, forming and welding parameters.
Heat Treatment
Heat
treatment depends on the selected grade and required mechanical properties.
Possible
treatments include:
- Annealing
- Normalizing
- Normalizing
and Tempering
- Quenching
and Tempering
- Stress
Relieving
Heat
treatment can improve strength, toughness, hardness and wear resistance
depending on the steel grade.
Advantages
- Seamless
construction
- High
strength
- Good
dimensional control
- Excellent
machinability for suitable grades
- Suitable
for precision components
- Available
in multiple alloy compositions
- Suitable
for heat treatment
- Good
fatigue performance
- Wide
range of applications
Conclusion
EN
10297-1 seamless circular steel tubes are designed for mechanical and general
engineering applications requiring controlled material properties, dimensional
accuracy and reliable tubular performance. The standard covers non-alloy and
alloy steel tubes in a wide range of grades and delivery conditions.
Ladhani
Metal Corporation supplies EN 10297-1 seamless circular steel tubes in required
grades, outside diameters, wall thicknesses, lengths and delivery conditions,
with mill test certificates and inspection as required.
To place order or enquiry contact
Ladhani Metal Corporation.
FOR REQUIREMENT OF THIS GRADE
OR FOR DETAIL CONTACT US AT :-
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