en 10025-3 s420n material

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

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

S420Nis 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 S420N material is engineered for heavy welded constructions requiring superior strength-to-weight ratio, excellent weldability, and reliable low-temperature performance, such as bridges, offshore platforms, cranes, high-rise buildings, and pressure vessels.

Our S420N plates are delivered in normalized (+N) condition, ensuring fine-grain microstructure, consistent mechanical properties, and full traceability.

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

S420N Material Overview (EN 10025-3)

S420N(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 Breakdown:

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

Gangsteel supplies S420N material in thicknesses from 6 mm to 250 mm, with CEV ≤ 0.48 for outstanding weldability.

Chemical Composition of S420N Material (Ladle Analysis, Max %)

Fine-grain control: Al ≥ 0.020% forms AlN to refine grain size. Low P & S = enhanced toughness and crack resistance.

Mechanical Properties of S420N Material (Normalized, Min Values)

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

S420N vs S420NL Material Comparison

S420N NL= S420NL — low-temperature variant.

S420N Material Equivalent Grades

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

Applications of S420N Material

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

Why Gangsteel for S420N Material?

• 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 materialis 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 S420N material for heavy welded structures in moderate cold environments. For -50°C, use S420NL.

FAQ

What is EN 10025-3 S420N material?

S420N materialis 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 microstructure via normalization, ensuring high toughness, ductility, and weldability for heavy structural applications.

What is the chemical composition of S420N material?

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 composition delivers high strength with low brittleness and excellent weldability.

What are the mechanical properties of S420N material?

• 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 S420N material 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 S420N material?

• 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 S420N material?

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