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Introduction
EN
10028-3 covers flat products made of weldable fine-grain steels for pressure
purposes. These are pressure vessel steels supplied primarily in the normalized
or normalized and tempered condition, depending on the grade and delivery
requirements.
EN
10028-3 steel sheets and plates provide high strength, good weldability, excellent
toughness, and reliable performance in pressure vessels, boilers, storage
tanks, heat exchangers, and other pressure equipment. The NL1 and NL2 grades
are designed for applications requiring improved impact toughness at lower
temperatures.
Ladhani
Metal Corporation is a manufacturer, supplier, and exporter of EN 10028-3
Weldable Fine-Grain Steel Sheet & Plate, supplying pressure vessel plates
in various grades, thicknesses, widths, lengths, heat-treatment conditions, and
customized dimensions worldwide.
Applicable Standard
Standard
Specification: EN 10028-3
Organization:
European Committee for Standardization (CEN)
Title:
Flat Products Made of Steels for Pressure Purposes – Part 3: Weldable Fine
Grain Steels, Normalized
EN
10028-3 specifies requirements for weldable fine-grain steel flat products used
in pressure equipment.
Material Type
•
Fine-Grain Carbon Steel
• Weldable Fine-Grain Steel
• Pressure Vessel Steel
• Normalized Steel
• Alloyed Fine-Grain Steel
• Low-Temperature Pressure Vessel Steel
Forms of Supply
•
Fine-Grain Steel Sheets
• Fine-Grain Steel Plates
• Pressure Vessel Plates
• Boiler Plates
• Weldable Steel Plates
• Hot Rolled Plates
• Cut-to-Length Plates
• Custom Cut Sheets
• Heat Exchanger Plates
Grades Covered Under EN 10028-3
P275N
| P275NH | P275NL1 | P275NL2 | P355N | P355NH | P355NL1 | P355NL2 | P460N |
P460NH | P460NL1 | P460NL2
The
N grades are normalized fine-grain steels, NH grades provide specified
elevated-temperature properties, while NL1 and NL2 grades are intended for
lower-temperature applications with different impact toughness requirements.
Supply Condition
•
Normalized Condition
• Normalized and Tempered Condition
• Hot Rolled Condition
• Heat Treated Condition
• Stress Relieved Condition
• Cut-to-Length Condition
Surface Finish
•
Hot Rolled Finish
• Mill Finish
• Shot Blasted Finish
• Smooth Finish
• Pickled Finish
• Descaled Finish
Standard Sizes
EN 10028-3 Steel Sheets & Plates
Thickness:
3 mm to 250 mm
Width:
Up to 3,500 mm
Length:
Up to 12,000 mm
Custom
thicknesses, widths, lengths, cut sizes, edge conditions, and surface finishes
are available according to customer requirements.
Chemical Composition of EN 10028-3
Chemical
composition varies according to the selected fine-grain steel grade.
|
Grade |
C
% Max. |
Si
% Max. |
Mn
% |
P
% Max. |
S
% Max. |
Al
Total % |
Cr
% Max. |
Mo
% Max. |
Ni
% Max. |
|
P275N / NH / NL1 / NL2 |
0.16 |
0.40 |
0.80–1.50 |
0.025 |
0.015 |
0.020 |
0.30 |
0.08 |
0.50 |
|
P355N / NH / NL1 / NL2 |
0.18 |
0.50 |
1.10–1.70 |
0.025 |
0.015 |
0.020 |
0.30 |
0.08 |
0.50 |
|
P460N / NH / NL1 / NL2 |
0.20 |
0.60 |
1.10–1.70 |
0.025 |
0.015 |
0.020 |
0.30 |
0.10 |
0.80 |
The
grades also have controlled limits for nitrogen, copper, niobium, titanium and
vanadium. The exact limits can vary between the N, NH, NL1 and NL2 grades.
Mechanical Properties of EN 10028-3
Mechanical
properties depend on grade and plate thickness. The following values represent
the specified room-temperature tensile requirements; yield strength decreases
with increasing plate thickness.
|
Grade |
Yield Strength MPa |
Tensile Strength MPa |
Elongation % |
|
P275N / NH / NL1
/ NL2 |
275–215 |
350–510 |
≥23–24 |
|
P355N / NH / NL1
/ NL2 |
355–295 |
450–630 |
≥21–22 |
|
P460N / NH / NL1
/ NL2 |
460–370 |
510–730 |
≥16–17 |
For
example, P275 grades have a minimum yield strength of 275 MPa for thicknesses
up to 16 mm, decreasing to 215 MPa for thicknesses from 150 to 250 mm. P355
grades range from 355 MPa to 295 MPa, while P460 grades range from 460 MPa to
370 MPa depending on thickness.
Key Features of EN 10028-3 Steel Sheet &
Plate
•
High yield strength
• Excellent tensile strength
• Fine-grain microstructure
• Excellent weldability
• Good impact toughness
• Suitable for low-temperature applications
• Good resistance to brittle fracture
• Excellent pressure resistance
• Good dimensional stability
• Suitable for heavy-duty pressure equipment
Applications of EN 10028-3 Steel Sheet &
Plate
Pressure Vessel Industry
•
Pressure Vessels
• Storage Tanks
• Reactor Vessels
• Process Vessels
• High-Pressure Equipment
Power Generation Industry
•
Boilers
• Steam Drums
• Power Plant Equipment
• Heat Exchangers
• Pressure Components
Oil & Gas Industry
•
Oil Storage Tanks
• Gas Processing Equipment
• Pressure Vessels
• Separators
• Processing Equipment
Petrochemical Industry
•
Refinery Equipment
• Process Vessels
• Storage Tanks
• Heat Exchangers
• Petrochemical Processing Equipment
Low-Temperature Applications
•
Cryogenic-Related Equipment
• Low-Temperature Storage Tanks
• Pressure Equipment
• Outdoor Pressure Systems
• Cold-Climate Industrial Equipment
Fabrication and Welding
EN
10028-3 plates are designed to provide good weldability and fabrication
characteristics.
•
Suitable for conventional welding processes
• Good bending characteristics
• Suitable for forming
• Good weldability
• Good cold-forming capability within specified limits
• Suitable for pressure vessel fabrication
• Reliable welded joint performance
For
significant cold forming or forming outside the specified temperature range,
appropriate subsequent heat treatment may be required.
Heat Treatment
EN
10028-3 products are generally supplied in the normalized condition.
•
Normalizing refines grain structure
• Normalizing improves toughness
• Controlled heat treatment provides uniform mechanical properties
• Normalized and tempered processing may be used where specified
• Stress relieving can reduce residual stresses
• Proper heat treatment maintains pressure-vessel performance
Advantages of EN 10028-3 Steel Sheet &
Plate
•
High-strength pressure vessel steel
• Excellent weldability
• Fine-grain structure
• Superior impact toughness
• Suitable for low-temperature service
• Good resistance to brittle fracture
• Excellent mechanical properties
• Suitable for heavy plate applications
• Reliable pressure-bearing performance
• Available in multiple strength and toughness classes
Conclusion
EN
10028-3 Steel Sheet & Plate covers weldable fine-grain steels for pressure
purposes. The standard includes P275, P355 and P460 strength classes in N, NH,
NL1 and NL2 grades, providing different combinations of yield strength, tensile
strength, weldability and impact toughness.
Ladhani Metal Corporation supplies EN 10028-3
Weldable Fine-Grain Steel Sheet & Plate in P275N, P275NH, P275NL1, P275NL2,
P355N, P355NH, P355NL1, P355NL2, P460N, P460NH, P460NL1 and P460NL2 grades,
with various thicknesses, widths, lengths, heat-treatment conditions and
customized dimensions for pressure vessels, boilers, storage tanks, heat
exchangers, oil and gas equipment, petrochemical plants and industrial pressure
applications.
FOR REQUIREMENT OF THIS GRADE
OR FOR DETAIL CONTACT US AT :-
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