EN 10025 S355NL Standard Overview

EN 10025 S355NL: Standard Overview

EN 10025 S355NL is a high-strength, low-alloy structural steel grade specified under EN 10025-3, part of the European standard EN 10025 for hot-rolled structural steels. Renowned for its fine-grain structure, low-temperature toughness, and excellent weldability, S355NL EN 10025 is ideal for demanding applications such as offshore platforms, wind towers, and bridges in cold climates. This article provides an overview of the EN 10025-3 standard, S355NL’s properties, chemical composition, mechanical characteristics, and applications, addressing core keywords en 10025 s355nl and s355nl en 10025. For more details, visit our EN 10025-3 S355NL normalized structural steel plate.

What is the EN 10025-3 Standard?

EN 10025-3 is part of the EN 10025 series, specifying technical delivery conditions for normalized or normalized rolled weldable fine-grain structural steels. It includes grades like S275N/NL, S355N/NL, S420N/NL, and S460N/NL, with S355NL being a prominent grade for its balance of strength and toughness. The standard ensures:

• Normalization: Refines grain structure for enhanced toughness.
• Low-Temperature Performance: Impact testing at -20°C (N grades) or -50°C (NL grades).
• Weldability: Low carbon equivalent (CEV) for fabrication ease.

S355NL EN 10025 is designated as:

• S: Structural steel.
• 355: Minimum yield strength of 355 MPa (≤16 mm).
• NL: Normalized, with impact toughness tested at -50°C.

Chemical Composition of S355NL

The chemical composition of EN 10025 S355NL ensures strength, toughness, and weldability:

Carbon Equivalent (CEV): ≤0.43% (≤63 mm), calculated as CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15, ensures excellent weldability for S355NL EN 10025.

Mechanical Properties of S355NL

The mechanical properties of EN 10025 S355NL support its use in high-stress, cold environments:

• Yield Strength: ≥355 MPa (≤16 mm) for load-bearing.
• Tensile Strength: 470-630 MPa for durability.
• Elongation: ≥22% for ductility.
• Impact Toughness: ≥27 J at -50°C for cold climates.

Delivery Conditions and Specifications

• Standard: EN 10025-3:2019.
• Condition: Normalized (+N) or normalized rolled.
• Thickness Range: 6–250 mm.
• Widths: 2000, 2500, 3000 mm (standard).
• Lengths: Up to 12,000 mm.
• Certifications: EN 10204 3.1/3.2, UT testing (EN 10160 optional).

Welding and Heat Treatment

S355NL EN 10025 is highly weldable:

• Welding: GMAW or SAW per EN 1011-2. Preheating (100-150°C) for >20 mm; no preheat for thinner plates.
• PWHT: Optional at 550-650°C for critical welds.
• Consumables: ER70S-6 (GMAW), EM12K flux with EH14 wire (SAW).

Applications

EN 10025 S355NL is used in:

• Offshore Platforms: Fatigue-resistant in cold marine environments.
• Wind Turbine Towers: Supports sub-zero loads.
• Bridges and Cranes: Load-bearing in northern climates.
• Pressure Vessels: Low-temperature storage systems.

Explore related grades like EN 10025-3 S420NL normalized structural steel plate.

Equivalent Grades

Please See EN 10025-3 S355N normalized structural steel plate.

Why Choose Gangsteel?

Gangsteel supplies S355NL EN 10025:

• Inventory: Extensive stock in China.
• 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 S355NL normalized structural steel plate.

FAQ

What is the EN 10025 S355NL standard?
EN 10025 S355NL is part of EN 10025-3, specifying normalized fine-grain structural steels with 355 MPa yield strength, -50°C toughness, and excellent weldability for applications like offshore platforms.

What properties define S355NL EN 10025?
S355NL EN 10025 has a yield strength of ≥355 MPa, tensile strength of 470-630 MPa, elongation ≥22%, and impact toughness ≥27 J at -50°C, ideal for cold-climate structures.

Is EN 10025 S355NL weldable?
Yes, EN 10025 S355NL is highly weldable with CEV ≤0.43%, supporting GMAW/SAW welding with minimal preheating (100-150°C for >20 mm), ensuring strong welds for bridges and wind towers.

What are applications of S355NL EN 10025?
S355NL EN 10025 is used in offshore platforms, wind turbine towers, bridges, and pressure vessels in cold climates, leveraging its -50°C toughness and high strength.

How does EN 10025 S355NL compare to S355J2?
EN 10025 S355NL is normalized, tested at -50°C for cold climates; S355J2 (EN 10025-2) is hot-rolled, tested at -20°C, suited for temperate regions.

What certifications are provided for S355NL EN 10025?
S355NL EN 10025 comes with EN 10204 3.1/3.2 certificates, UT testing (EN 10160), and ABS/LR/BV/DNV approvals, ensuring compliance for global structural projects.