en 10025-3 s420n normalized structural steel plate

EN 10025-3 S420N Steel Plate supplier

What is EN 10025-3 S420N Steel?

EN 10025-3 S420N steel plate is a high-strength, fine-grained structural steel optimized for weldable applications in demanding structural projects. It adheres to the European standard EN 10025-3, which outlines technical delivery conditions for normalized/normalized rolled weldable fine grain structural steels. The standard delivery condition is normalized or normalized rolled, promoting a consistent microstructure for superior toughness and ductility.

The grade "EN 10025-3 S420N" is interpreted as:

• S: Represents "structural steel."
• 420: Signifies the minimum yield strength of 420 MPa for thicknesses up to 16 mm.
• N: Indicates normalization or normalized rolling as the heat treatment.

Classified as a fine grain structural steel, EN 10025-3 S420N features controlled grain refinement for enhanced impact resistance, weldability, and fatigue performance, ideal for load-bearing components in civil engineering.

Discover our full lineup of EN 10025-3 normalized steel plates for various structural needs.

What is the Chemical Composition of EN 10025-3 S420N Steel?

EN 10025-3 S420N's chemical makeup is precisely regulated to balance strength, toughness, and weldability, with low carbon and alloy levels to limit hardening during welding.

The following table details the ladle analysis (during melting) and product analysis (finished product) per EN 10025-3:

The Carbon Equivalent (CEV) follows: CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15. For EN 10025-3 S420N, CEV ≤0.43% (up to 63 mm thickness), rendering it readily weldable with minimal risk of cold cracking, suitable for standard fabrication techniques.

Mechanical Properties of EN 10025-3 S420N

EN 10025-3 S420N delivers robust mechanical performance, with a minimum yield strength of ≥420 MPa, tensile strength of 520-680 MPa, and elongation ≥19%. It ensures reliable impact toughness of ≥27 J at -20°C via Charpy V-notch testing.

Properties adjust with thickness; refer to this table for specifics:

This profile supports EN 10025-3 S420N's use in high-stress, dynamic loading scenarios.

What is the Equivalent Grade of EN 10025-3 S420N?

EN 10025-3 S420N aligns with several global standards, with minor variances in specs. Key equivalents include:

For low-temperature variants, view our EN 10025-3 S420NL normalized structural steel plate.

What is the Difference Between EN 10025-3 S420N and S420NL / S420M / S355?

Key variances guide selection for specific environments:

• EN 10025-3 S420N vs S420NL: Identical strength, but S420NL guarantees impact toughness at -50°C (vs -20°C for EN 10025-3 S420N), suiting colder climates like offshore or northern infrastructure. Explore EN 10025-3 S420NL.
• EN 10025-3 S420N vs S420M: S420M employs thermomechanical controlled processing (TMCP) for tighter grain control and superior weldability/cost efficiency, whereas EN 10025-3 S420N uses normalization for broader applicability.
• EN 10025-3 S420N vs S355: EN 10025-3 S420N boasts higher yield (420 MPa vs 355 MPa) for lighter designs and greater loads, though at higher cost; S355 offers better affordability and ease for moderate-duty uses. See our EN 10025-3 S355N normalized structural steel plate.

These factors influence durability, fabrication, and budget.

Welding and Heat Treatment of EN 10025-3 S420N

Thanks to its low CEV, EN 10025-3 S420N welds seamlessly via GMAW or SAW, per EN 1011-2 guidelines.

• Preheating: Advised for >20 mm thickness (100-150°C) to mitigate hydrogen cracking; ambient suffices for thinner gauges.
• Post-Weld Heat Treatment (PWHT): Optional; stress relief at 550-650°C for vital joints.

Suggested fillers:

• GMAW: ER70S-6 (AWS A5.18).
• SAW: EH12 with EM12K flux.

This ensures crack-free, high-integrity welds.

Applications of EN 10025-3 S420N Steel Plate

EN 10025-3 S420N excels in sectors demanding strength and resilience:

• Bridges and Civil Structures: Girders, pylons, and spans under heavy traffic.
• Heavy Machinery: Cranes, excavators, and earthmoving equipment.
• Pressure Vessels and Boilers: For elevated temperatures and pressures.
• Offshore and Wind Structures: Towers and platforms enduring fatigue.

Opt for EN 10025-3 S420N due to its elevated strength-to-weight, -20°C toughness, and weld-friendly nature, aligning with Eurocode standards for safe, efficient builds.

Related: Our EN 10025-3 S420N normalized structural steel plate or EN 10025-3 S355NL normalized structural steel plate.

Available Thickness, Width, and Supply Conditions

Gangsteel supplies EN 10025-3 S420N in versatile dimensions:

• Thickness: 6–200 mm (tailored options 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 UT testing (EN 10160) on request. Options include primed surfaces for corrosion resistance.

Why Buy EN 10025-3 S420N Steel from Gangsteel?

As premier producers and exporters, Gangsteel guarantees top-tier EN 10025-3 S420N:

• Stock Levels: Ready-to-ship from China facilities.
• Lead Times: 7-30 days globally.
• Export Reach: Europe, Asia, Middle East, Americas.
• Inspections: SGS/BV/TUV verified.

Additional services: Cutting, welding, bending. Includes mill certificates and ABS/LR/BV/DNV approvals.

Get quotes for EN 10025-3 S420N normalized structural steel plate.

FAQ

Is EN 10025-3 S420N steel good for welding?

Absolutely; low CEV (≤0.43%) enables straightforward arc welding without specialized aids.

What temperature can EN 10025-3 S420N be used in?

Effective from -20°C to +500°C, with certified toughness at -20°C. Upgrade to S420NL for sub-zero.

Does EN 10025-3 S420N require preheating when welding?

Yes for >20 mm (100-150°C); no for thinner plates.

Is EN 10025-3 S420N equivalent to ASTM A572?

Close to A572 Grade 60 (yield ~415 MPa), but EN 10025-3 S420N's fine-grain normalization provides better toughness; not identical.

What is the maximum thickness available for EN 10025-3 S420N?

Up to 200 mm, with properties adjusted accordingly for thicker sections to maintain performance.

Can EN 10025-3 S420N be used in marine or offshore environments?

Yes, its high strength and toughness suit offshore platforms and wind towers, but pair with coatings for corrosion protection in saline conditions.

What is the difference between EN 10025-3 S420N and EN 10025-3 S460N?

EN 10025-3 S460N offers higher yield strength (460 MPa vs 420 MPa) for more demanding loads, but at a premium cost; both share similar weldability and normalization.

How does EN 10025-3 S420N compare to Chinese standard Q420E?

Q420E is a close equivalent with comparable strength and low-temperature toughness, but EN 10025-3 S420N provides stricter European compliance for grain refinement and certification.

Browse more like EN 10025-3 S275N normalized structural steel plate or EN 10025-3 S275NL.