EN 10025-3 S275NL High-strength Low-alloy (HSLA) Steel Plate

EN 10025-3 S275NL is a European standard thermomechanically rolled, weldable fine-grain structural steel with improved toughness for use in low-temperature environments.

The S275NL steel plate is a low-alloy high-strength structural steel, specifically designed for structural applications requiring higher toughness and good weldability.

Standard and Grade Designation

Standard: EN 10025-3 (Part 3: Normalized/normalized rolled weldable fine grain structural steels)

Grade: S275NL

"S" = Structural steel

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

"N" = Normalized or normalized rolled

"L" = Impact tested at low temperatures (-50°C for NL grade)

It is primarily used for structural components that require low-temperature toughness and weldability, such as:

1. Construction machinery in low-temperature environments (e.g., cranes, excavators)

2. Bridges, pressure vessels, storage tanks

3. Offshore platforms, wind turbine towers, and other outdoor/low-temperature load-bearing structures

Scenarios for selecting S275NL:

Liquefied natural gas (LNG) equipment, infrastructure in Arctic regions, etc.

Comparison with Other Grades:

S275JR (basic impact properties, no low-T requirement)

S355NL (higher strength, 355 MPa yield, same low-T toughness)