GB/T Q355NH Weathering Steel ProfessionalCertified
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Gnee Steel (Tianjin) Co., Ltd. is one of the most professional gb/t q355nh weathering steel professionalcertified manufacturers and suppliers in China. Welcome to wholesale customized gb/t q355nh weathering steel professionalcertified at competitive price from our factory. Good service and quality products are available.
GB/T Q355NH Weathering Steel
Standardized under GB/T 4171, GB/T Q355NH Weathering Steel features a minimum yield strength of 355 MPa and is specially alloyed with elements like copper, chromium, and nickel. These additions allow Q355NH to form a dense oxide layer when exposed to the atmosphere-eliminating the need for paint or external coatings while protecting the structure from further corrosion. With excellent durability, structural reliability, and low maintenance demands, Q355NH is a preferred choice for engineers working on exposed, high-performance infrastructure.
Key Performance Features
High Structural Strength (≥ 355 MPa Yield): Q355NH provides strong load-bearing capacity for mid- to large-scale construction, offering a solid balance between strength and ductility.
Self-Protecting Patina: Its weathering composition forms a stable oxide film under environmental exposure, slowing down corrosion and eliminating the need for repainting in most climates.
Excellent Weldability & Fabrication: Despite its strength, Q355NH maintains good workability-making it suitable for prefabrication, modular construction, and complex geometries.
Reduced Lifecycle Costs: By removing the need for repeated anti-corrosion treatments, Q355NH cuts down on labor, materials, and long-term operational costs.
Aesthetic and Functional Surface: Over time, the steel develops a rich, earthy patina that blends into natural and industrial landscapes, adding visual character alongside functional longevity.
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