S275N 1.0490 Material Datasheet

S275N 1.0490 Material Datasheet

As a premier exporter and manufacturer of high-quality structural steel plates, Gangsteel specializes in producing EN 10025-3 compliant materials, including the versatile S275N 1.0490 steel grade.

S275N 1.0490 is a normalized fine-grain structural steel designed for welded constructions requiring enhanced toughness at low temperatures, down to -20°C.

Ideal for heavy-duty applications in bridges, cranes, and offshore structures, our S275N 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.

Introduction to S275N 1.0490 Material

S275N 1.0490 material is a non-alloy quality structural steel specified in EN 10025-3:2004 (Hot rolled products of structural steels - Part 3: Normalised/normalised rolled weldable fine grain structural steels), with material number 1.0490. It is a weldable fine-grain steel intended for use in fixed structures, offering improved toughness through normalization or normalized rolling. The "N" suffix denotes normalized delivery, and it is suitable for projects requiring impact resistance at -20°C.

Gangsteel produces S275N 1.0490 plates in thicknesses up to 250 mm, with precise control over chemical composition to meet CEV limits for optimal weldability. Our plates are rigorously tested to comply with international standards, ensuring reliability for global projects.

Chemical Composition of S275N 1.0490 Material

The chemical composition of S275N 1.0490 is balanced for strength, ductility, and weldability, with a maximum Carbon Equivalent Value (CEV) of 0.40 for nominal thicknesses ≤ 100 mm.

*Note: For long products, P and S may be 0.005% higher. If N-binding elements are present, the Al minimum does not apply. Cu above 0.35% may affect hot forming.

Mechanical Properties of S275N 1.0490 Material

S275N 1.0490 exhibits robust mechanical characteristics, with properties varying by thickness to accommodate diverse fabrication needs. All values are for normalized (+N) condition. The table below consolidates yield strength, tensile strength, elongation, and Charpy V-Notch impact energy (longitudinal and transverse at -20°C minimums).

*Notes: Elongation based on Lo = 5.65 √So. Impact values are minimums; higher at warmer temperatures (e.g., longitudinal at 20°C: 63 J). These properties position S275N 1.0490 as a cost-effective choice for structures needing high toughness, outperforming standard S275JR in sub-zero conditions.

Heat Treatment Guide for S275N 1.0490 Material

S275N 1.0490 is primarily supplied in the normalized (+N) or normalized rolled condition as per EN 10025-3, which refines the grain structure for improved toughness and weldability.

Normalization Process

• Heating Temperature: Austenitize at 880–920°C (uniform throughout the thickness).
• Soaking Time: Hold for approximately 1 hour per 25 mm of thickness, minimum 30 minutes.
• Cooling: Air cool to room temperature at a controlled rate to avoid excessive hardening.
• Purpose: Refines ferrite-pearlite structure, enhances ductility, and ensures compliance with mechanical properties post-delivery.

If post-delivery heat treatment is needed (e.g., after hot forming), re-normalize to maintain properties. Avoid quenching unless specified, as it may alter toughness.

Welding Heat Treatment Guidelines

• Preheating: Not required for thicknesses ≤ 40 mm; recommend 50–100°C for thicker sections to prevent cold cracking, based on CEV ≤ 0.40.
• Interpass Temperature: Maximum 200°C to preserve fine grain.
• Post-Weld Heat Treatment (PWHT): Optional stress-relief at 550–650°C for 1 hour per 25 mm thickness, followed by slow cooling. Not typically needed due to low hardenability.
• Hot Forming: Perform above 850°C; re-normalize if forming temperature drops below 720°C.

Always consult EN 1011-2 for welding recommendations. Gangsteel provides plates optimized for these processes to minimize heat treatment needs.

Applications of S275N 1.0490 Material

S275N 1.0490 is widely used in:

• Heavy Engineering: Cranes, earthmoving equipment, and load-bearing frameworks.
• Infrastructure: Bridges, viaducts, and offshore platforms where low-temperature ductility is critical.
• Construction: Welded structures in shipbuilding and pressure vessels.

For higher strength needs, consider upgrading to en 10025 3 s355n normalized structural steel plate or en 10025 3 s355nl normalized structural steel plate.

Equivalent Grades to S275N 1.0490

Why Choose Gangsteel for S275N 1.0490 Material?

With state-of-the-art mills and a commitment to ISO-certified quality, Gangsteel delivers S275N plates tailored to your specifications. Stocked in various sizes and ready for immediate export worldwide. For detailed pricing and availability, visit our en 10025 3 s275n normalized structural steel plate product page or contact our sales team today.

Summary

S275N 1.0490 material is a weldable normalized fine-grain structural steel (EN 10025-3) with 275 MPa yield, 370–510 MPa tensile, and 47 J impact at -20°C. Its controlled chemistry (CEV ≤ 0.40) and fine-grain structure make it ideal for welded structures in moderate cold environments like bridges and offshore platforms. S275N from Gangsteel ensures reliability for global projects.

FAQ

What is the chemical composition of S275N 1.0490 material?

Max 0.20% C, 0.40% Si, 0.80–1.60% Mn, P 0.035%, S 0.030%, N 0.012%, CEV ≤0.40, with Al ≥0.020% for grain refinement.

What are the mechanical properties of S275N 1.0490 material?

Yield 275 MPa (≤16 mm) to 195 MPa (200–250 mm), tensile 370–510 MPa (≤100 mm) to 350–470 MPa, elongation 23–22%, impact 47 J at -20°C longitudinal.

What is the CEV of S275N 1.0490 material?

Maximum CEV of 0.40, ensuring excellent weldability without preheating for thicknesses under 40 mm.

Is S275N 1.0490 suitable for welding without preheating?

Yes, its low CEV (0.40) allows welding without preheating for thicknesses ≤40 mm; use low-hydrogen fillers per EN 1011-2.

What are common equivalents to S275N 1.0490 material?

DIN StE 285, ASTM A572 Gr. 50, JIS SM490B, GB Q295B offer similar properties when normalized.