Q355NH Corten Steel Pipe

Q355NH is a high-strength weathering steel developed under the GB/T 4171 standard, designed for use in outdoor, load-bearing, and long-life applications. This grade features improved atmospheric corrosion resistance and higher strength compared to Q295NH and Q345GNH, making it ideal for bridges, towers, and heavy structural elements.

Alloyed with copper, phosphorus, chromium, and nickel, Q355NH develops a dense and stable protective oxide layer (patina) that reduces further corrosion without the need for paint or coating.

🔧 Mechanical Properties

• Yield Strength: ≥ 355 MPa

• Tensile Strength: 490–630 MPa

• Elongation: ≥ 20%

• Plate Thickness: 3–100 mm

• Standard: GB/T 4171

🏗 Applications

• Large-span bridges and steel frame buildings

• Railway infrastructure and highway barriers

• Outdoor structures exposed to wind and rain

• Decorative corten architecture with structural needs

• Marine zone steelwork with frequent wet-dry cycles

📦 Supply Details

• Form: Plate, sheet, coil, processed parts

• Surface Finish: Mill, rust-pretreated, blasted

• Processing: Cutting, bending, drilling, welding

• Test Reports: 3.1 MTC, dimensional inspection, mechanical testing

• Export Packaging: Palletized, steel strapped, water-resistant wrap

Q355NH offers exceptional strength and corrosion resistance for modern corten steel architecture and infrastructure that needs to endure both time and the elements.