bs en 10025 3 s355nl material proerties

BS EN 10025-3 S355NL Material Properties

BS EN 10025-3 S355NL is a high-strength, fine-grained structural steel designed for demanding applications, particularly in low-temperature environments. Specified under the European standard BS EN 10025-3, it is delivered in a normalized or normalized rolled condition, ensuring a refined microstructure for superior toughness and weldability.

With a minimum yield strength of 355 MPa and impact toughness tested at -50°C, S355NL is ideal for bridges, offshore platforms, and wind towers in cold climates. This article details its chemical composition, mechanical properties, equivalent grades, and applications, providing a comprehensive overview of its capabilities. For more information, explore our EN 10025-3 S355NL normalized structural steel plate.

What is BS EN 10025-3 S355NL Steel?

BS EN 10025-3 S355NL is a weldable fine grain structural steel under the European standard BS EN 10025-3, which outlines delivery conditions for normalized/normalized rolled steels. The designation breaks down as:

• S: Structural steel.
• 355: Minimum yield strength of 355 MPa for thicknesses up to 16 mm.
• NL: Normalized with impact testing at -50°C for low-temperature performance.

This fine-grained steel offers excellent toughness, weldability, and resistance to brittle fracture, making it suitable for structural applications in harsh environments. Learn more about our EN 10025-3 normalized steel plates.

Chemical Composition of BS EN 10025-3 S355NL

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

Below is a table of the ladle analysis (melt stage) and product analysis (finished plate) per BS EN 10025-3:

The Carbon Equivalent (CEV), calculated as CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15, is ≤0.43% for thicknesses ≤63 mm, ensuring excellent weldability with minimal risk of cold cracking.

Mechanical Properties of BS EN 10025-3 S355NL

BS EN 10025-3 S355NL offers a balance of high strength, ductility, and low-temperature toughness, with a minimum yield strength of ≥355 MPa, tensile strength of 470-630 MPa, and elongation ≥22%. Its impact toughness is ≥27 J at -50°C (Charpy V-notch, longitudinal), making it suitable for cold environments.

The mechanical properties vary by thickness, as shown below:

These properties ensure reliability in demanding structural applications.

Equivalent Grades of BS EN 10025-3 S355NL

BS EN 10025-3 S355NL has equivalents in various international standards, with minor differences in composition or testing:

For related grades, see EN 10025-3 S355N normalized structural steel plate.

Welding and Heat Treatment of BS EN 10025-3 S355NL

BS EN 10025-3 S355NL’s low CEV (≤0.43%) ensures excellent weldability using GMAW or SAW, per EN 1011-2 guidelines.

• Preheating: Not required for thicknesses ≤20 mm; 100-150°C recommended for thicker plates to prevent hydrogen cracking.
• Post-Weld Heat Treatment (PWHT): Typically unnecessary; stress relief at 550-650°C optional for critical welds.

Recommended consumables:

• GMAW: ER70S-6 (AWS A5.18).
• SAW: EM12K flux with EH14 wire.

This supports high-quality, crack-free welds.

Applications of BS EN 10025-3 S355NL

BS EN 10025-3 S355NL is widely used in:

• Offshore Platforms: Resists fatigue in cold marine environments.
• Wind Turbine Towers: Supports heavy loads in sub-zero conditions.
• Bridges and Cranes: Load-bearing components in northern climates.
• Pressure Vessels: Suitable for low-temperature storage systems.

Its high strength-to-weight ratio, -50°C toughness, and weldability make it ideal for Eurocode 3-compliant structures. Explore similar grades like EN 10025-3 S420NL normalized structural steel plate.

Available Thickness, Width, and Supply Conditions

Gangsteel offers BS EN 10025-3 S355NL in:

• Thickness: 6–250 mm (custom available).
• Width: 2000 / 2500 / 3000 mm standard.
• Length: Up to 12,000 mm.

Supplied hot-rolled and normalized, with EN 10204 3.1/3.2 certificates and optional UT testing (EN 10160). Primed surfaces available for corrosion protection.

Why Buy BS EN 10025-3 S355NL from Gangsteel?

Gangsteel is a leading supplier of BS EN 10025-3 S355NL:

• Inventory: Extensive stock in China for immediate availability.
• Delivery: 7-30 days to Europe, Asia, Middle East, Americas.
• Certifications: SGS/BV/TUV testing, ABS/LR/BV/DNV approvals.
• Processing: Cutting, welding, bending to specifications.

Get quotes for EN 10025-3 S355NL normalized structural steel plate.

FAQ

What are the key properties of BS EN 10025-3 S355NL?Yield ≥355 MPa, tensile 470-630 MPa, elongation ≥22%, impact ≥27 J at -50°C.

Is BS EN 10025-3 S355NL good for welding?Yes; CEV ≤0.43% supports GMAW/SAW with minimal preheating (100-150°C for >20 mm).

What temperatures is BS EN 10025-3 S355NL suitable for?-50°C to +500°C, with guaranteed toughness at -50°C.

How does BS EN 10025-3 S355NL compare to S355N?S355NL is tested at -50°C, S355N at -20°C, making S355NL better for colder climates. See EN 10025-3 S355N normalized structural steel plate.

Is BS EN 10025-3 S355NL equivalent to ASTM A572?Closest to A572 Grade 65 (yield ~450 MPa), but S355NL’s -50°C toughness is superior.

What is the max thickness for BS EN 10025-3 S355NL?Up to 250 mm, with adjusted properties for consistency.

Can BS EN 10025-3 S355NL be used in offshore structures?Yes; its -50°C toughness suits platforms, with coatings for corrosion resistance.

How does BS EN 10025-3 S355NL differ from S420NL?S420NL has higher yield (420 MPa vs 355 MPa), both tested at -50°C. Check EN 10025-3 S420NL normalized structural steel plate.

What is the Chinese equivalent of BS EN 10025-3 S355NL?Q345E; similar strength and -40°C toughness, but S355NL has stricter EU standards.

Explore related grades like EN 10025-3 S275N normalized structural steel plate or EN 10025-3 S460NL normalized structural steel plate.