en 10025-3 s420nl normalized structural steel plate

EN 10025-3 S420NL Steel Plate supplier

What is EN 10025-3 S420NL Steel?

EN 10025-3 S420NL steel plate is a high-strength, fine-grained structural steel designed for weldable applications in low-temperature environments. It complies with the European standard EN 10025-3, which specifies technical delivery conditions for normalized/normalized rolled weldable fine grain structural steels. The typical delivery condition is normalized or normalized rolled, ensuring a refined microstructure for enhanced toughness and resistance to brittle fracture.

The grade "EN 10025-3 S420NL" is defined as:

• S: Structural steel.
• 420: Minimum yield strength of 420 MPa for thicknesses up to 16 mm.
• NL: Normalized with impact testing at -50°C for superior low-temperature performance.

Classified as a fine grain structural steel, EN 10025-3 S420NL features controlled grain size, offering excellent weldability, ductility, and impact resistance, making it ideal for demanding structures in cold climates.

Discover our full range of EN 10025-3 normalized steel plates for various structural applications.

What is the Chemical Composition of EN 10025-3 S420NL Steel?

The chemical composition of EN 10025-3 S420NL is optimized to balance strength, toughness, and weldability, with low carbon and alloying elements to minimize welding challenges.

The table below shows the ladle analysis (melt stage) and product analysis (finished plate) per EN 10025-3:

The Carbon Equivalent (CEV) is calculated as: CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15. For EN 10025-3 S420NL, CEV is ≤0.43% (up to 63 mm thickness), ensuring excellent weldability with low risk of cold cracking, suitable for standard fabrication processes.

Mechanical Properties of EN 10025-3 S420NL

EN 10025-3 S420NL delivers high strength and toughness, with a minimum yield strength of ≥420 MPa, tensile strength of 520-680 MPa, and elongation ≥19%. It provides robust impact toughness of ≥27 J at -50°C (Charpy V-notch, longitudinal), making it suitable for sub-zero conditions.

Properties vary with thickness; refer to the table:

These properties make EN 10025-3 S420NL ideal for high-stress, cold-environment structures.

What is the Equivalent Grade of EN 10025-3 S420NL?

EN 10025-3 S420NL aligns with several international standards, with minor variations:

For the -20°C variant, see EN 10025-3 S420N normalized structural steel plate.

What is the Difference Between EN 10025-3 S420NL and S420N / S420ML / S355NL?

Key differences guide material selection:

• EN 10025-3 S420NL vs S420N: Both have 420 MPa yield, but S420NL ensures impact toughness at -50°C (vs -20°C for S420N), suiting colder environments like arctic infrastructure. Explore EN 10025-3 S420N normalized structural steel plate.
• EN 10025-3 S420NL vs S420ML: S420ML employs thermomechanical controlled processing (TMCP) for finer grains and cost-effective welding, while S420NL’s normalization offers consistent low-temperature performance.
• EN 10025-3 S420NL vs S355NL: S420NL provides higher yield (420 MPa vs 355 MPa) for stronger, lighter designs at a higher cost; S355NL is more economical for moderate loads. Check EN 10025-3 S355NL normalized structural steel plate.

These factors affect performance, cost, and environmental suitability.

Welding and Heat Treatment of EN 10025-3 S420NL

EN 10025-3 S420NL’s low CEV ensures seamless welding with GMAW or SAW, per EN 1011-2 guidelines.

• Preheating: Advised for >20 mm thicknesses (100-150°C) to prevent hydrogen cracking; thinner plates can weld at ambient temperature.
• Post-Weld Heat Treatment (PWHT): Typically not needed; stress relief at 550-650°C optional for critical welds.

Recommended consumables:

• GMAW: ER70S-6 (AWS A5.18).
• SAW: EM12K flux with EH14 wire.

This ensures durable, defect-free welds.

Applications of EN 10025-3 S420NL Steel Plate

EN 10025-3 S420NL excels in industries requiring strength in cold conditions:

• Offshore Platforms: Fatigue-resistant in icy marine environments.
• Wind Turbine Towers: Supports heavy loads in cold climates.
• Bridges and Cranes: High-strength components in northern regions.
• Pressure Vessels and Pipelines: For low-temperature storage or transport.

Chosen for its high strength-to-weight ratio, -50°C toughness, and excellent weldability, it meets Eurocode 3 standards for safe, efficient structures.

Related grades: EN 10025-3 S420NL normalized structural steel plate or EN 10025-3 S355NL normalized structural steel plate.

Available Thickness, Width, and Supply Conditions

Gangsteel supplies EN 10025-3 S420NL in versatile dimensions:

• Thickness: 6–200 mm (custom thicknesses available).
• Width: 2000 / 2500 / 3000 mm standard.
• Length: Up to 12,000 mm.

Delivered hot-rolled and normalized, with EN 10204 3.1/3.2 certificates and optional UT testing (EN 10160). Primed surfaces available for corrosion protection.

Why Buy EN 10025-3 S420NL Steel from Gangsteel?

As a leading producer and exporter, Gangsteel delivers premium EN 10025-3 S420NL:

• Inventory: Extensive stock in China for quick access.
• Delivery: 7-30 days worldwide.
• Exports: Europe, Asia, Middle East, Americas.
• Testing: SGS/BV/TUV certified.

We offer cutting, welding, bending, mill test certificates, and ABS/LR/BV/DNV approvals.

Request quotes for EN 10025-3 S420NL normalized structural steel plate.

FAQ

Is EN 10025-3 S420NL steel good for welding?

Yes; CEV ≤0.43% enables efficient arc welding without specialized consumables.

What temperature can EN 10025-3 S420NL be used in?

From -50°C to +500°C, with certified toughness at -50°C, ideal for cold climates.

Does EN 10025-3 S420NL require preheating when welding?

For >20 mm, 100-150°C is recommended; thinner plates weld at ambient.

Is EN 10025-3 S420NL equivalent to ASTM A572?

Comparable to A572 Grade 60 (yield ~415 MPa), but S420NL’s fine-grain normalization enhances low-temp toughness; not identical.

What is the maximum thickness for EN 10025-3 S420NL?

Up to 200 mm, with properties adjusted for consistent performance.

Can EN 10025-3 S420NL be used in offshore wind farms?Y

es; its -50°C impact resistance suits towers and platforms, with coatings for corrosion protection.

What differs between EN 10025-3 S420NL and S460NL?

S460NL has higher yield (460 MPa vs 420 MPa) for heavier loads, both with -50°C toughness. See EN 10025-3 S460NL normalized structural steel plate.

How does EN 10025-3 S420NL compare to Chinese Q420E?

Q420E aligns in strength and -50°C performance, but S420NL adheres to stricter EU standards for grain control and certification.

Is EN 10025-3 S420NL suitable for high-rise structures?

Yes; its strength and toughness support tall buildings in cold regions, ensuring stability.

Explore more options like EN 10025-3 S355N normalized structural steel plate or EN 10025-3 S275N normalized structural steel plate.