GB/T 4171 Q550NH Weather Resistant Steel Plate

GB/T 4171 Q550NH Weather Resistant Steel Plate

GB/T 4171 Q550NH – 550MPa record-breaking weathering steel. Nano-alloy design for ultimate corrosion/load performance. Engineered for transoceanic bridges, Arctic platforms, and future megaprojects. The new frontier in structural materials.
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Description
Technical Parameters

Q550NH is the pinnacle of weathering steel technology under China's GB/T 4171 standard, delivering an extraordinary 550MPa yield strength alongside unmatched atmospheric corrosion resistance. Its next-generation Cu-P-Cr-Ni-Mo-Nb-V-RE alloy system forms an ultra-dense, self-healing patina, providing 12-18× greater durability than carbon steel in the most aggressive environments.

Breakthrough Advantages:
Ultra-high strength enables revolutionary lightweight designs
Exceptional -60°C low-temperature toughness
Controlled carbon equivalent (Ceq) for superior weldability
Unrivaled resistance to coastal, industrial, and Arctic conditions

Transformational Applications:

World-record span bridges (e.g., transoceanic crossings)

Gigantic offshore wind turbine foundations

Arctic oil/gas infrastructure

Next-gen high-rise mega-structures

As the strongest weathering steel commercially available, Q550NH redefines structural engineering possibilities – maximizing payloads, minimizing maintenance, and conquering extreme environments with unprecedented reliability.

 

 

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