CertifiedGB/T Q355NH Weathering Steel
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Gnee Steel (Tianjin) Co., Ltd. is one of the most professional certifiedgb/t q355nh weathering steel manufacturers and suppliers in China. Welcome to wholesale customized certifiedgb/t q355nh weathering steel at competitive price from our factory. Good service and quality products are available.
GB/T Q355NH Weathering Steel
This self-protecting feature makes it ideal for outdoor structures in harsh environments.
Developed under the Chinese national standard GB/T, Q355NH offers excellent strength, weldability, and weather resistance, making it a cost-effective choice for long-term projects.
Product Information Table
| Property | Details |
|---|---|
| Standard | GB/T 4171 (Chinese National Standard) |
| Material Type | Weathering Steel (Atmospheric Corrosion-Resistant) |
| Yield Strength | ≥355 MPa |
| Tensile Strength | 470–630 MPa |
| Elongation | ≥22% |
| Main Alloys | Cu, Cr, Ni, P (enhances weather resistance) |
| Corrosion Resistance | 2–8x better than ordinary carbon steel |
| Surface Appearance | Develops a rust-colored patina over time (protective layer) |
| Common Forms | Plates, sheets, structural sections (H-beams, angles, etc.) |
Key Applications in Industrial Construction
Q355NH weathering steel is widely used in projects where durability and low maintenance are critical:
Bridges & Highways – Ideal for exposed steel bridges, guardrails, and sign supports.
Building Facades & Roofing – Used in modern architectural designs for a rustic, industrial look.
Transmission Towers & Power Plants – Resists corrosion in humid or polluted environments.
Railway & Transportation – Used in freight cars, shipping containers, and station structures.
Outdoor Sculptures & Landscaping – Popular for artistic installations due to its natural rust aesthetic.
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