S275NL Material Specification Chemical,Mechanical and Weldin

S275NL Material Specification | Chemical, Mechanical, and Welding Information

As a premier exporter and manufacturer of high-quality structural steel plates, Gangsteel specializes in producing EN 10025-3 compliant materials, including the versatile S275NL steel grade.

S275NL is a normalized fine-grain structural steel designed for welded constructions requiring enhanced toughness at low temperatures, down to -50°C.

Our S275NL plates are delivered in normalized or normalized rolled conditions to ensure superior weldability and impact resistance.

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

Chemical Composition of S275NL Steel

The chemical composition is balanced for strength, ductility, and weldability, with maximum Carbon Equivalent Value (CEV) of 0.42 for nominal thicknesses ≤ 100 mm.

*Note: For long products, P and S may be 0.005% higher. Low carbon and alloying minimize welding cracks.

Mechanical Properties of S275NL Steel

Properties are for normalized (+N) condition, varying by thickness. Minimum values are listed.

*Notes: Elongation per Lo = 5.65 √So. Impact values increase at higher temperatures.

Welding Information for S275NL Steel

S275NL offers excellent weldability due to low CEV (≤ 0.42) and fine-grain structure.

• Preheating: Not required for ≤ 40 mm thickness; 50–100°C recommended for >40 mm to prevent cold cracking.
• Interpass Temperature: Maximum 200°C to maintain grain refinement.
• Post-Weld Heat Treatment (PWHT): Optional stress relief at 550–650°C (1 hour per 25 mm thickness), followed by slow cooling; rarely needed.
• Welding Processes: Suitable for arc welding (SMAW, GMAW, GTAW); use matching fillers like E7018.
• Guidelines: Follow EN 1011-2; avoid temperatures below 720°C during hot forming—re-normalize if necessary.

For related grades, see en 10025 3 s275n normalized structural steel plate or en 10025 3 s275nl normalized structural steel plate.