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OR FOR DETAIL CONTACT US AT :-Introduction
EN
10155 specifies structural steels with improved atmospheric corrosion
resistance, commonly known as weathering steels. These steels are alloyed with
elements such as copper, chromium and nickel to provide enhanced resistance to
atmospheric corrosion compared with conventional structural steels. The
historical EN 10155:1993 grades were subsequently incorporated into the EN
10025-5 series.
Ladhani
Metal Corporation supplies EN 10155 weathering steel sheet, plate and strip in
different grades, sizes and delivery conditions for structural and engineering
requirements.
Applicable Standard
EN
10155:1993 – Structural Steels with Improved Atmospheric Corrosion Resistance –
Technical Delivery Conditions.
EN
10155 is a historical specification; its weathering-steel grades were carried
forward into EN 10025-5. For current procurement, the applicable EN 10025-5
grade should be confirmed.
Material Type
EN
10155 covers structural carbon steels with improved atmospheric corrosion
resistance. The addition of copper and chromium, together with controlled
alloying, promotes the formation of a protective surface layer during
atmospheric exposure.
Forms of Supply
- Weathering
Steel Plates
- Weathering
Steel Sheets
- Weathering
Steel Strips
- Hot
Rolled Plates
- Hot
Rolled Sheets
- Structural
Steel Plates
- Cut-to-Size
Plates
- Custom
Width Sheets
- Coil
and Strip
Grades Covered
S235J0W
| S235J2W | S355J0WP | S355J2WP | S355J0W | S355J2G1W | S355J2G2W | S355K2G1W |
S355K2G2W
These
are the principal EN 10155:1993 designations; several were renamed or
consolidated under EN 10025-5.
Grade Designation
- S235
– Minimum yield strength class of approximately 235 MPa
- S355
– Minimum yield strength class of approximately 355 MPa
- J0
– Impact energy requirement at 0°C
- J2
– Impact energy requirement at −20°C
- K2
– Higher impact energy requirement at −20°C
- W
– Structural steel with improved atmospheric corrosion resistance
- WP
– Phosphorus-alloyed weathering steel with enhanced atmospheric corrosion
resistance
- G1
/ G2 – Quality/deoxidation designation used in the historical EN 10155
system
Chemical Composition
|
Designation According to EN 10027-1 and ECISS IC 10 |
Method of
Deoxidation |
C max. % |
Si max. % |
Mn % |
P % |
S max. % |
N max. % |
Addition of
Nitrogen Binding Elements |
Cr % |
Cu % |
Others |
|
S235J0W |
FN |
0.13 |
0.40 |
0.20–0.60 |
max. 0.040 |
0.040 |
0.009ᵃ |
— |
0.40–0.80 |
0.25–0.55 |
c |
|
S235J2W |
FF |
0.13 |
0.40 |
0.20–0.60 |
max. 0.040 |
0.035 |
— |
Yes |
0.40–0.80 |
0.25–0.55 |
c |
|
S355J0WP |
FN |
0.12 |
0.75 |
max. 1.0 |
0.06–0.15 |
0.040 |
0.009ᵃ |
— |
0.30–1.25 |
0.25–0.55 |
c |
|
S355J2WP |
FF |
0.12 |
0.75 |
max. 1.0 |
0.06–0.15 |
0.035 |
— |
Yes |
0.30–1.25 |
0.25–0.55 |
c |
|
S355J0W |
FN |
0.16 |
0.50 |
0.50–1.50 |
max. 0.040 |
0.040 |
0.009ᵃ |
— |
0.40–0.80 |
0.25–0.55 |
d |
|
S355J2G1W |
FF |
0.16 |
0.50 |
0.50–1.50 |
max. 0.035 |
0.035 |
— |
Yes |
0.40–0.80 |
0.25–0.55 |
— |
|
S355J2G2W |
FF |
0.16 |
0.50 |
0.50–1.50 |
max. 0.035 |
0.035 |
— |
Yes |
0.40–0.80 |
0.25–0.55 |
— |
|
S355K2G1W |
FF |
0.16 |
0.50 |
0.50–1.50 |
max. 0.035 |
0.035 |
— |
Yes |
0.40–0.80 |
0.25–0.55 |
— |
|
S355K2G2W |
FF |
0.16 |
0.50 |
0.50–1.50 |
max. 0.035 |
0.035 |
— |
Yes |
0.40–0.80 |
0.25–0.55 |
— |
Notes
ᵃ The steel shall contain at least one of the following elements: Al total ≥ 0.020%, Nb: 0.015–0.060%, V: 0.02–0.12%, Ti: 0.02–0.10%. If three elements are used in combination, at least one of them shall be present with the minimum content indicated.
ᵇ It is permissible to exceed the specified values provided that each increase of 0.001% N reduces the P maximum content by 0.005%; the N content of the ladle analysis, however, shall not be more than 0.012%.
ᶜ The steels may show a Ni content of max. 0.65%.
ᵈ The steels may contain max. 0.30% Mo and max. 0.15% Zr.
ᵉ The maximum value for nitrogen does not apply if the chemical composition shows a minimum total Al content of 0.020% or if sufficient other N-binding elements are present. The N-binding elements shall be mentioned in the inspection document.
Additional alloying elements
such as nitrogen-binding elements may be specified depending on grade. Some
S355 grades may also permit additions of molybdenum or zirconium under the
historical specification.
Mechanical Properties
|
Grade |
Yield Strength Min. MPa |
Tensile Strength MPa |
Elongation Min. % |
|
S235J0W |
235 |
360–510 |
19–22 |
|
S235J2W |
235 |
360–510 |
17–22 |
|
S355J0WP |
355 |
510–680 |
16–22 |
|
S355J2WP |
355 |
510–680 |
14–20 |
|
S355J0W |
355 |
510–680 |
16–22 |
|
S355J2G1W |
355 |
510–680 |
14–20 |
|
S355J2G2W |
355 |
510–680 |
14–20 |
|
S355K2G1W |
355 |
510–680 |
14–20 |
|
S355K2G2W |
355 |
510–680 |
14–20 |
Yield
strength decreases with increasing product thickness, so the exact required
thickness range should be checked against the applicable standard table.
Delivery Conditions
EN
10155 flat products may be supplied in delivery conditions agreed between the
purchaser and manufacturer. Depending on grade and product, normalized or
normalized-rolled conditions may be used.
Surface Finish
EN
10155 weathering steel sheet, plate and strip can be supplied with:
- Hot
Rolled Surface
- Shot
Blasted Surface
- Pickled
Surface
- Descaled
Surface
- Mill
Scale Surface
- Prepared
and Primed Surface
The
surface condition can be selected according to fabrication and end-use
requirements.
Standard Sizes
EN
10155 products can be supplied in standard and custom dimensions according to
grade, thickness and manufacturing capability.
- Sheet
Thickness: As specified by grade and order
- Plate
Thickness: Available in structural plate ranges
- Strip
Width: Standard and custom widths
- Length:
Fixed length or cut-to-size
- Width:
Custom widths available on request
Key Features
- Improved
atmospheric corrosion resistance
- Formation
of a protective weathering layer
- Good
structural strength
- Good
weldability when appropriate grades and procedures are selected
- Good
toughness
- Suitable
for outdoor structural applications
- Reduced
dependence on conventional protective coatings in suitable environments
- Good
resistance to atmospheric weathering
Applications
Structural Construction
- Bridges
- Building
structures
- Railway
structures
- Structural
frameworks
- Industrial
buildings
Transportation Infrastructure
- Railway
bridges
- Highway
bridges
- Sign-support
structures
- Transportation
infrastructure
- Outdoor
structural components
Industrial Structures
- Industrial
frames
- Storage
structures
- Equipment
supports
- Structural
platforms
- Outdoor
steel structures
Fabrication and Welding
EN
10155 weathering steels can be processed using conventional structural-steel
fabrication techniques. Welding procedures should take into account the
specific grade, thickness, carbon equivalent and required mechanical
properties.
Cutting,
drilling, forming and machining can be performed using suitable procedures and
equipment.
Heat Treatment
Weathering
structural steels are generally supplied in the delivery condition specified by
the standard or purchase order. Heat treatment after delivery should be
performed only when appropriate for the particular grade and application
because uncontrolled heating can affect mechanical properties and
corrosion-resistant characteristics.
Advantages
- Enhanced
resistance to atmospheric corrosion
- High
structural strength
- Good
toughness
- Suitable
for exposed outdoor structures
- Attractive
natural weathered appearance
- Reduced
maintenance requirements in suitable environments
- Available
in sheet, plate and strip forms
- Suitable
for structural fabrication
EN 10155 Equivalent / Successor Grades
The
EN 10155:1993 weathering-steel grades were incorporated into the later EN
10025-5 standard. For example, S355J2G2W from EN 10155 corresponds to S355J2W
in EN 10025-5, while S355K2G2W corresponds to S355K2W.
Conclusion
EN
10155 structural steels with improved atmospheric corrosion resistance are
weathering steels developed for structural applications where enhanced
resistance to atmospheric corrosion is required. S235J0W, S235J2W, S355J0WP,
S355J2WP, S355J0W, S355J2G1W, S355J2G2W, S355K2G1W and S355K2G2W represent the
principal historical EN 10155 grades. For new projects and procurement, the
corresponding EN 10025-5 designation should be confirmed because EN 10155 has
been superseded by the later European standard.
Ladhani Metal Corporation can supply
weathering steel sheet, plate and strip in required grades, sizes, thicknesses
and specifications.
FOR REQUIREMENT OF THIS GRADE
OR FOR DETAIL CONTACT US AT :-
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