What is EN 10025 3 material?

What is EN 10025-3 Material?

EN 10025-3 is a European standard that specifies technical delivery conditions for normalized or normalized rolled weldable fine grain structural steels. These materials are high-strength, low-alloy steels designed for applications requiring excellent toughness, weldability, and performance in demanding environments, including low temperatures.

 The standard covers a range of steel grades used in structural applications such as bridges, offshore platforms, wind towers, and heavy machinery. This article provides an overview of EN 10025-3 materials, their grades, properties, and applications, with insights into sourcing from Gangsteel. For more details, explore our EN 10025-3 normalized steel plates.

Overview of EN 10025-3 Material

EN 10025-3 materials are fine grain structural steels delivered in a normalized condition, which involves heat treatment to refine the grain structure, enhancing toughness and resistance to brittle fracture. The standard is part of the broader EN 10025 series, focusing on weldable structural steels, with Part 3 specifically addressing fine grain steels tested for impact resistance at -20°C (N grades) or -50°C (NL grades). The designation for each grade, such as S355NL, indicates:

• S: Structural steel.
• Number (e.g., 355): Minimum yield strength in MPa for thicknesses ≤16 mm.
• N/NL: Normalized (N) or normalized with low-temperature toughness (NL).

These steels are ideal for applications requiring high strength-to-weight ratios and reliability in cold or high-stress conditions.

EN 10025-3 Material Grades

EN 10025-3 includes eight primary grades, categorized by strength and impact testing temperature:

• N Grades (S275N, S355N, S420N, S460N): Tested at -20°C, suitable for moderate climates.
• NL Grades (S275NL, S355NL, S420NL, S460NL): Tested at -50°C, ideal for sub-zero environments.

For specific grades, see EN 10025-3 S355NL normalized structural steel plate or EN 10025-3 S460NL normalized structural steel plate.

Chemical Composition of EN 10025-3 Materials

The chemical composition is tailored for weldability and toughness. Below is an example for S355NL (ladle analysis):

Carbon Equivalent (CEV): Calculated as CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15, typically ≤0.43% for S355NL and ≤0.45% for S460NL, ensuring excellent weldability. Higher grades like EN 10025-3 S420NL normalized structural steel plate have similar compositions with slight increases in alloying elements.

Mechanical Properties of EN 10025-3 Materials

Mechanical properties vary by grade and thickness. Below is a summary for key grades at ≤16 mm:

Properties scale with thickness (up to 250 mm for S275N/NL, S355N/NL; 200 mm for S420N/NL, S460N/NL). NL grades are optimized for low-temperature toughness.

Equivalent Grades

EN 10025-3 grades have equivalents in other standards:

For example, explore EN 10025-3 S275N normalized structural steel plate.

Welding and Heat Treatment

EN 10025-3 materials are highly weldable due to low CEV:

• Welding: Use GMAW or SAW with fillers like ER70S-6 (GMAW) or EM12K flux with EH14 wire (SAW). Preheating (100-150°C) is advised for >20 mm thicknesses.
• PWHT: Optional at 550-650°C for critical welds; rarely required.

Applications of EN 10025-3 Materials

EN 10025-3 grades are used in:

• S275N/NL: General buildings, cold-region pipelines (NL).
• S355N/NL: Bridges, wind towers, offshore platforms (NL for arctic).
• S420N/NL: Heavy machinery, cold-climate cranes (NL).
• S460N/NL: High-strength frameworks, arctic offshore (NL).

See EN 10025-3 S355N normalized structural steel plate for temperate applications.

Why Choose Gangsteel for EN 10025-3 Materials?

Gangsteel supplies all EN 10025-3 grades:

• Inventory: Extensive stock in China for S275N/NL, S355N/NL, S420N/NL, S460N/NL.
• Sizes: Thickness 6–250 mm, widths 2000/2500/3000 mm, lengths up to 12,000 mm.
• Delivery: 7-30 days globally.
• Certifications: EN 10204 3.1/3.2, UT testing (EN 10160), ABS/LR/BV/DNV approvals.
• Processing: Cutting, welding, bending.

Contact us for EN 10025-3 S420N normalized structural steel plate.

FAQ

What is EN 10025-3 material?High-strength, fine-grained structural steels, normalized for toughness and weldability, used in bridges, offshore, and wind towers.

What grades are included in EN 10025-3?S275N, S275NL, S355N, S355NL, S420N, S420NL, S460N, S460NL.

What’s the difference between N and NL grades?N grades are tested at -20°C; NL grades at -50°C for colder environments.

Are EN 10025-3 materials weldable?Yes; low CEV (e.g., ≤0.43% for S355NL) ensures easy welding with minimal preheating.

What are typical applications?Bridges, offshore platforms, wind towers, machinery; NL grades for sub-zero climates.

What is the ASTM equivalent for S355NL?A572 Grade 65 or A633 Grade E (better for low-temp toughness).

What is the maximum thickness?250 mm for S275N/NL, S355N/NL; 200 mm for S420N/NL, S460N/NL.

Explore EN 10025-3 S275NL normalized structural steel plate for low-temperature needs.