FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
LADHANI METAL CORPORATION, MUMBAI, INDIA
Introduction
EN 10025-3
is a European standard specifying normalized or normalized rolled low-alloy
structural steels with improved toughness, commonly referred to as fine-grain
structural steels. These steels provide enhanced yield strength, notch
toughness, and uniform mechanical properties, making them suitable for welded
constructions, heavy engineering, and structural applications in moderate to
low-temperature environments.
EN 10025-3
steels are widely used in construction, bridges, offshore structures,
shipbuilding, railways, and heavy engineering, where toughness and reliability
are essential. They are commonly supplied as plates, sheets, and coils and are
often used in applications requiring improved toughness at sub-zero
temperatures.
Applicable
Standards and Specifications
Standard: EN
10025-3
Material Type: Non-alloy, fine-grain structural steel
Product Forms: Plates, sheets, coils, strips
Manufacturing Process: Hot Rolled (HR)
Delivery Condition: Normalized (+N) or Normalized Rolled (+NR)
EN 10025-3
steels comply with European construction codes and are suitable for structural
projects requiring both strength and toughness.
Available
Grades of EN 10025-3 Structural Steel
EN 10025-3
defines multiple grades based on yield strength, tensile strength, and impact
toughness:
S275N,
S275NL
S355N, S355NL
S420N, S420NL
S460N, S460NL
Grades with
the “N” suffix are normalized, while “NL” indicates normalized rolled with
enhanced notch toughness. These grades are selected based on design
requirements, environmental temperature, and structural load conditions.
Chemical
Composition of EN 10025-3 Structural Steel (%)
S275N /
S275NL
|
Element |
Composition (%) |
|
Carbon (C) |
0.20 max |
|
Manganese
(Mn) |
1.40 max |
|
Phosphorus
(P) |
0.035 max |
|
Sulfur (S) |
0.035 max |
|
Nitrogen
(N) |
0.012 max |
|
Copper
(Cu) |
0.55 max |
S355N /
S355NL
|
Element |
Composition (%) |
|
Carbon (C) |
0.24 max |
|
Manganese
(Mn) |
1.60 max |
|
Phosphorus
(P) |
0.035 max |
|
Sulfur (S) |
0.035 max |
|
Nitrogen
(N) |
0.012 max |
|
Copper
(Cu) |
0.55 max |
S420N /
S420NL
|
Element |
Composition (%) |
|
Carbon (C) |
0.26 max |
|
Manganese
(Mn) |
1.60 max |
|
Phosphorus
(P) |
0.035 max |
|
Sulfur (S) |
0.035 max |
|
Nitrogen
(N) |
0.012 max |
|
Copper
(Cu) |
0.55 max |
S460N /
S460NL
|
Element |
Composition (%) |
|
Carbon (C) |
0.27 max |
|
Manganese
(Mn) |
1.70 max |
|
Phosphorus
(P) |
0.035 max |
|
Sulfur (S) |
0.035 max |
|
Nitrogen
(N) |
0.012 max |
|
Copper
(Cu) |
0.55 max |
Note: The
“NL” grades have improved impact toughness at low temperatures while chemical
composition remains within standard limits.
Mechanical
Properties of EN 10025-3 Structural Steel
|
Grade |
Yield
Strength (MPa) |
Tensile
Strength (MPa) |
Elongation
(%) |
|
S275N /
S275NL |
≥ 275 |
430 – 580 |
≥ 22 |
|
S355N /
S355NL |
≥ 355 |
470 – 630 |
≥ 22 |
|
S420N /
S420NL |
≥ 420 |
520 – 680 |
≥ 20 |
|
S460N /
S460NL |
≥ 460 |
560 – 720 |
≥ 20 |
Impact test
requirements:
NL grades: tested at −20°C or −50°C depending on thickness to ensure notch
toughness. N grades: typically tested at 0°C.
Physical
Properties (Typical)
Density:
approximately 7.85 g/cm³
Melting Point: approximately 1425 – 1540°C
Thermal Conductivity: approximately 50 – 60 W/m·K
Modulus of Elasticity: approximately 200 GPa
Thickness,
Width, and Size Range
Thickness: 3
mm to 150 mm
Width: up to 3000 mm
Length: 2000 mm to 12000 mm or as per customer requirement
Plates can
be supplied in cut-to-size, sheared, or flame-cut conditions.
Key Features
and Advantages
Improved
notch toughness and ductility
High yield strength with uniform mechanical properties
Excellent weldability and formability
Wide range of grades for low-temperature and structural applications
Compliance with European construction and structural codes
Weldability
and Fabrication
EN 10025-3
steels exhibit excellent weldability using SMAW, GMAW, FCAW, and SAW processes.
Preheating is generally not required for thinner plates, but thicker sections
or NL grades may require controlled preheat and post-weld heat treatment to
avoid hydrogen-induced cracking.
Machinability
Machinability
is moderate; care should be taken with higher-strength grades (S420, S460) to
optimize cutting speeds, tooling, and cooling during fabrication.
Corrosion
Resistance
EN 10025-3
steels have limited corrosion resistance. Protective coatings such as painting,
galvanizing, or epoxy coating are recommended for outdoor or humid
environments.
Typical
Applications of EN 10025-3 Structural Steel
Construction and Infrastructure
High-rise buildings and industrial frameworks
Bridges, pedestrian walkways, and flyovers
Roof trusses and flooring systems
Industrial and Fabrication
Heavy machinery frames
Equipment supports and mounting structures
Cranes and material handling equipment
Marine and Offshore Structures
Shipbuilding structural components (non-critical)
Port jetties, offshore platforms, and access structures
Transportation and Heavy Engineering
Railway wagons and bridges
Truck and trailer chassis
Conveyors and structural components
Energy Sector
Wind turbine towers
Power plant frameworks
Oil and gas secondary structural supports
Conclusion
EN 10025-3
Structural Steel Plate / Sheet is a high-performance fine-grain structural
steel with enhanced toughness, strength, and weldability. Its availability in
multiple grades and low-temperature toughness makes it suitable for a wide
range of applications including construction, bridges, heavy engineering,
shipbuilding, and offshore structures. Proper fabrication, welding, and surface
protection ensure long service life and reliable performance across demanding
environments.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
Product Link:
https://www.indiamart.com/proddetail/en-10025-3-s275n-steel-sheet-2858286518830.html?sellerpreview=1
https://www.indiamart.com/proddetail/en-10025-3-s355n-steel-coil-2858286607230.html?sellerpreview=1
https://www.ladhanimetal.in/products/en-10025-3-s460nl-steel-strip/3280
https://www.ladhanimetal.in/products/en-10025-3-s460n-steel-coil/3279
https://www.ladhanimetal.in/products/en-10025-3-s420n-steel-sheet/3277
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