en 10025 3 s420n steel

EN 10025 3 S420N Steel: High-Strength Normalized Fine-Grain Structural Steel

As a premier exporter and manufacturer of high-quality structural steel plates, Gangsteel specializes in producing EN 10025 3 compliant materials, including the robust S420N steel.

EN 10025 3 S420N steelis a high-strength, low-alloy (HSLA), fine-grain normalized structural steel with 420 MPa minimum yield strength and 40 J impact toughness at -20°C.

This EN 10025 3 S420N steel is designed for heavy welded constructions such as bridges, offshore platforms, cranes, high-rise buildings, and pressure vessels where strength-to-weight ratio, weldability, and low-temperature performance are essential.

Our S420N steel plates are delivered in normalized (+N) condition to ensure fine-grain microstructure, excellent ductility, and consistent properties.

For a comprehensive overview of our en 10025 3 normalized steel plate offerings, explore our full range.

EN 10025 3 S420N Steel Overview

S420N steel(material number 1.8902) is defined in EN 10025-3:2019 — Hot rolled products of structural steels — Part 3: Technical delivery conditions for normalized/normalized rolled weldable fine grain structural steels.

Designation:

S420NL= same steel, tested at -50°C (27 J) for arctic use.

Gangsteel supplies EN 10025 3 S420N steel in 6 mm to 250 mm thickness, with CEV ≤ 0.48 for superior weldability.

Chemical Composition of EN 10025 3 S420N Steel (Ladle Analysis, Max %)

Fine-grain refinement: Al ≥ 0.020% forms AlN. Low P & S = improved toughness and crack resistance.

Mechanical Properties of EN 10025 3 S420N Steel (Normalized, Min Values)

Elongation per Lo = 5.65 √So. Test direction: transverse unless specified.

EN 10025 3 S420N Steel vs S420NL

S420N NL= S420NL — low-temperature variant.

Equivalent Grades for EN 10025 3 S420N Steel

S420NC steel= Not valid — likely typo for S420N or S420MC (EN 10149-2).

Applications of EN 10025 3 S420N Steel

• Long-Span Bridges
• Offshore Jackets(non-arctic)
• Heavy Cranes
• High-Rise Columns
• Thick-Walled Pressure Vessels

Why Gangsteel for EN 10025 3 S420N Steel?

• Mill-Direct Supply
• Full Certification– EN 10204 3.1/3.2
• Testing– UT, Z35, HIC, PWHT
• Stock– 6–250 mm
• Global Export

Contact: admin@gangsteel.comProduct Page: en 10025 3 s420n normalized structural steel plate

Summary

EN 10025 3 S420N steelis a high-strength normalized fine-grain structural steel with 420 MPa yield, 520–680 MPa tensile, and 40 J impact at -20°C. It is the ideal EN 10025 3 S420N steel for heavy welded structures in moderate cold environments. For -50°C, use S420NL.

FAQ

What is EN 10025 3 S420N steel?

EN 10025 3 S420N steelis a high-strength normalized weldable fine-grain structural steel with 420 MPa min yield (≤16 mm), 520–680 MPa tensile, and 40 J impact at -20°C. It features fine-grain structure via normalization for high toughness and weldability in heavy structural applications.

What is the chemical composition of EN 10025 3 S420N steel?

Max 0.20% C, 1.00–1.70% Mn, 0.025% P, 0.020% S, CEV ≤ 0.48, with Al ≥ 0.020% for grain refinement. This ensures high strength with low brittleness.

What are the mechanical properties of EN 10025 3 S420N steel?

• Yield: 420 MPa (≤16 mm) → 340 MPa (200–250 mm)
• Tensile: 520–680 MPa (≤100 mm), 500–650 MPa (>100 mm)
• Elongation: 19% (≤63 mm), 18% (>63 mm)
• Impact: 40 J longitudinal / 27 J transverse at -20°C All in normalized condition.

How does EN 10025 3 S420N steel compare to S420NL?

Same yield, tensile, and chemistry— only impact test differs:

• S420N: 40 J at -20°C
• S420NL: 27 J at -50°C

Use S420NL for arctic or offshore exposure.

What are the equivalent grades for EN 10025 3 S420N steel?

• ASTM: A572 Gr. 65
• DIN: TStE 420
• JIS: SM570
• GB: Q420B

All require normalized delivery and -20°C impact for equivalence.

Is S420NC a valid grade for EN 10025 3 S420N steel?

No— S420NC is not defined in EN 10025-3. Likely a typo for S420N, S420NL, or S420MC (thermomechanical grade).