GB/T 4171 Q460NH Weather Resistant Steel Plate

GB/T 4171 Q460NH Weather Resistant Steel Plate

GB/T 4171 Q460NH – 460MPa top-tier weathering steel. Cu-P-Cr-Ni-Mo alloy for extreme corrosion/load resistance. Used in megabridges, offshore towers, and skyscrapers. Maximizes strength-to-weight ratio.
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Description
Technical Parameters

Q460NH represents the premium grade in China's weathering steel series (GB/T 4171), delivering 460MPa yield strength and exceptional atmospheric corrosion resistance through its optimized Cu-P-Cr-Ni-Mo alloy system. Designed for extreme service conditions, it forms a dense, self-repairing patina that offers 8-12× longer life than conventional steel in aggressive environments.

Advanced Properties:
Ultra-high strength for weight-critical designs
Outstanding toughness (-40°C impact resistance)
Superior weldability with proper procedures
Resists coastal salt spray & industrial pollution

Engineered For:

Mega bridges (e.g., sea-crossing projects)

High-rise architectural frames

Offshore wind turbine towers

Heavy mining equipment

As the strongest weathering steel in GB/T 4171, Q460NH enables thinner/lighter structures without compromising durability – the ultimate solution for mission-critical infrastructure.

 

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