What is s275nl material steel?

What is S275NL Material Steel?

As a leading 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, offering excellent toughness at low temperatures down to -50°C.

It is ideal for demanding applications such as bridges, cranes, and offshore structures.

Our S275NL plates are supplied 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.

Overview of S275NL Material Steel

S275NL, designated as 1.0491 under EN 10025-3, is a low-alloy, fine-grain structural steel. The designation breaks down as follows: "S" for structural steel, "275" for a minimum yield strength of 275 MPa, and "NL" indicating normalized delivery with a minimum Charpy V-notch impact energy of 27 Joules at -50°C (longitudinal). This grade is engineered for applications requiring high ductility and resistance to brittle fracture in cold environments, distinguishing it from en 10025 3 s275n normalized structural steel plate, which is tested at -20°C.

Gangsteel supplies S275NL in thicknesses up to 250 mm, with controlled chemistry to ensure a maximum Carbon Equivalent Value (CEV) of 0.42 for excellent weldability. Our plates undergo rigorous testing, including ultrasonic and impact verification, to meet global standards.

Chemical Composition of S275NL Steel

The chemical composition is optimized for strength, weldability, and low-temperature performance (ladle analysis, max % unless noted, for thicknesses ≤ 100 mm).

*Note: Low P and S levels enhance toughness; CEV ensures minimal weld cracking.

Mechanical Properties of S275NL Steel

Properties are specified for normalized (+N) condition, varying by thickness (minimum values).

*Notes: Elongation per Lo = 5.65 √So. Impact values increase at higher temperatures (e.g., 63 J longitudinal at +20°C).

Applications of S275NL Steel

S275NL is used in:

• Infrastructure: Bridges and viaducts in cold climates.
• Heavy Engineering: Cranes, excavators, and load-bearing frames.
• Offshore and Marine: Platforms and ship structures requiring -50°C toughness.
• Construction: Welded pressure vessels and buildings in arctic regions.

For higher strength needs, consider en 10025 3 s355nl normalized structural steel plate or en 10025 3 s420nl normalized structural steel plate.

Why Choose Gangsteel for S275NL Steel?

Gangsteel delivers ISO-certified S275NL plates in custom sizes, with global export readiness. Visit our en 10025 3 s275nl normalized structural steel plate page for details and pricing.

Summary

S275NL is an EN 10025-3 normalized fine-grain structural steel with a 275 MPa yield strength, 370–510 MPa tensile strength, and 27 J impact energy at -50°C. Its low-carbon chemistry and fine-grain structure make it ideal for welded structures in cold environments like bridges and offshore platforms, ensuring durability and safety.

FAQ

What does S275NL stand for?

"S" denotes structural steel, "275" indicates 275 MPa minimum yield strength, and "NL" means normalized with impact testing at -50°C (27 J minimum longitudinal), per EN 10025-3.

What is the main difference between S275NL and S275N?

S275NL is impact tested at -50°C (27 J), while S275N is tested at -20°C (47 J), making S275NL better for extreme cold applications.

Is S275NL weldable?

Yes, its CEV ≤ 0.42 ensures excellent weldability; preheating is typically not needed for thicknesses ≤ 40 mm, following EN 1011-2 guidelines.

What are the equivalent grades for S275NL?

Common equivalents include DIN StE 285, ASTM A633 Gr. A, JIS SM490B, and GB Q275N (or Q275NL for -50°C).

What is the maximum thickness for S275NL?

Up to 250 mm, with yield strength adjusted to maintain performance in thicker sections.