EN 10025-3 S275N is a normalized/normalized rolled structural steel plate with a minimum yield strength of 275 MPa, designed for improved toughness at lower temperatures.

EN 10025-3 is a European standard that specifies the technical delivery conditions for normalized/normalized rolled weldable fine grain structural steels. The designation S275N refers to a specific grade within this standard.

Standard and Grade Designation

Standard: EN 10025-3 (European Norm for hot-rolled structural steels, Part 3: Normalized/normalized rolled weldable fine grain steels).

Grade: S275N

"S" = Structural steel

"275" = Minimum yield strength (ReH) of 275 MPa (at ≤16mm thickness)

"N" = Normalized/normalized rolled delivery condition (enhances toughness and homogeneity).

Impact Toughness: Tested at -20°C (typical Charpy V-notch requirement ≥27J).

Used in structural components requiring good weldability and toughness, such as:

1. Bridges

2. Buildings

3. Heavy machinery

4. Offshore structures (if additional requirements are met)

Scenario for selecting S275N:

Structures at normal or moderately low temperatures (above -20°C).

Projects that are cost-sensitive and do not require extreme low-temperature toughness.

Comparison with Other Grades:

S275JR (EN 10025-2): Non-normalized, lower impact toughness (tested at +20°C).

S355N: Higher strength (355 MPa yield) with similar normalized treatment.

Certification & Testing:

Supplied with inspection certificate (EN 10204 Type 3.1/3.2).

Testing includes tensile, impact (Charpy), and chemical analysis.