QWERNOX

High-strength weathering steel

Discover QWERNOX

QWERNOX is a structural weathering steel designed for long-term performance in bridges, architecture and demanding civil engineering works that blends resilience with elegance.

  1. High performance

    High-strength structural grades S355W and S460W for demanding infrastructure. Reliable toughness and performance even in heavy plate thicknesses.

  2. Proven weldability

    Controlled carbon equivalent for predictable welding behaviour. Suitable for thick welded joints in large structural assemblies.

  3. Reduced environmental footprint

    Available as low-CO₂ steel from EAF slabs.

  4. Design freedom

    Wide dimensional range. Predictable flatness, cutting and forming behaviour.

About QWERNOX

QWERNOX is an alloy structural steel engineered to resist atmospheric corrosion while carrying high structural loads reliably over decades. It combines mechanical strength, toughness and weldability with reduced maintenance requirements, making it a preferred choice for infrastructure exposed to the elements.

Available in yield strength classes ≥ 355 MPa and ≥ 460 MPa, QWERNOX is designed for bridges, civil engineering works, architecture and urban projects where durability and visual character are equally important.

Weathering as a strength

The name QWERNOX reflects its nature. The ‘W’ stands for ‘Weathering’, the controlled transformation of time and exposure into protection. It also refers to the European standard EN 10025-5, where the letter ‘W’ in grade designations identifies steels designed to resist atmospheric corrosion.

Exposed to air, rain and time, QWERNOX develops a stable self-protective patina that limits corrosion while maintaining its mechanical properties over decades. The result is a steel that combines certified strength, reduced maintenance and a natural aesthetic that evolves with its environment.

Inspired by the oak tree, known for its longevity and resilience, QWERNOX does not merely withstand the seasons. It evolves with them. Rain, sun and wind gradually strengthen its protection, layer after layer, turning time into an ally.