BS EN 10025-3 S355NL Properties

BS EN 10025-3 S355NL Properties

BS EN 10025-3 S355NL is a high-strength, low-alloy structural steel specified under the European standard EN 10025-3, which governs normalized or normalized rolled weldable fine grain structural steels. Known for its excellent strength, low-temperature toughness, and weldability, EN 10025 gr S355NL is widely used in demanding applications such as offshore platforms, wind towers, and bridges in cold climates.

This article details the key properties of S355NL, including its chemical composition, mechanical properties, weldability, and applications, addressing core keywords bs en 10025 3 s355nl and en 10025 gr s355nl. For more details, visit our EN 10025-3 S355NL normalized structural steel plate.

What is BS EN 10025-3 S355NL?

BS EN 10025-3 S355NL is a fine-grain structural steel designed for high strength and low-temperature performance. The designation breaks down as:

• S: Structural steel.
• 355: Minimum yield strength of 355 MPa for thicknesses up to 16 mm.
• NL: Normalized or normalized rolled, with impact toughness tested at -50°C.

The fine-grain microstructure of EN 10025 gr S355NL ensures excellent toughness and resistance to brittle fracture, making it ideal for cold environments.

Chemical Composition of S355NL

The chemical composition of BS EN 10025-3 S355NL is optimized for strength, toughness, and weldability, with low carbon and alloy content to enhance fabrication.

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

Mechanical Properties of S355NL

The mechanical properties of BS EN 10025-3 S355NL include high strength, toughness, and ductility, making it suitable for cold-climate applications.

• Yield Strength: ≥355 MPa (≤16 mm) supports heavy loads.
• Tensile Strength: 470-630 MPa ensures durability.
• Elongation: ≥22% allows flexibility in design.
• Impact Toughness: ≥27 J at -50°C guarantees performance in sub-zero conditions.

Welding and Heat Treatment

EN 10025 gr S355NL is highly weldable:

• Welding: Compatible with GMAW and 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).

The fine-grain structure of BS EN 10025-3 S355NL minimizes weld imperfections.

Applications

BS EN 10025-3 S355NL is used in:

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

Its properties align with Eurocode 3 standards. Explore related grades like EN 10025-3 S420NL normalized structural steel plate.

Equivalent Grades

See EN 10025-3 S355N normalized structural steel plate.

Why Choose Gangsteel?

Gangsteel supplies EN 10025 gr S355NL:

• 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 are the key properties of BS EN 10025-3 S355NL?
BS EN 10025-3 S355NL offers a minimum yield strength of 355 MPa (≤16 mm), tensile strength of 470-630 MPa, elongation ≥22%, and impact toughness ≥27 J at -50°C, ensuring high strength, ductility, and low-temperature performance for structural applications.

How does the EN 10025 gr S355NL composition support its properties?
The EN 10025 gr S355NL composition, with low carbon (≤0.18%), sulfur (≤0.015%), and grain-refining elements (Al, Nb), ensures fine-grain structure, enhancing -50°C toughness and weldability (CEV ≤0.43%).

Is BS EN 10025-3 S355NL suitable for cold climates?
Yes, BS EN 10025-3 S355NL is ideal for cold climates, with ≥27 J impact toughness at -50°C, making it reliable for arctic offshore platforms, wind towers, and northern bridges.

How weldable is EN 10025 gr S355NL?
EN 10025 gr S355NL is highly weldable with CEV ≤0.43%, supporting GMAW/SAW with minimal preheating (100-150°C for >20 mm), reducing weld imperfections for complex structures.

What are applications of BS EN 10025-3 S355NL?
BS EN 10025-3 S355NL is used in offshore platforms, wind towers, bridges, cranes, and pressure vessels in cold climates, leveraging its high strength and -50°C toughness.

How does EN 10025 gr S355NL compare to S355J2?
EN 10025 gr S355NL is normalized, tested at -50°C for cold climates; S355J2 is hot-rolled, tested at -20°C, suited for temperate regions. See EN 10025-3 S275N normalized structural steel plate.