Q235NH Weathering Steel Plate - also known as Q235NH Corten Steel Plate or Q235NH Atmospheric Corrosion Resistant Steel Plate - is a low-alloy structural steel with outstanding weather resistance, inheriting the good plasticity, toughness, and welding properties of ordinary carbon structural steel, while significantly improving its atmospheric corrosion resistance.
Compared with ordinary carbon steel, Q235NH Weathering Steel Plate offers 2–8 times higher weathering performance and 1.5–10 times better paint adhesion, ensuring long-term structural integrity and reduced maintenance costs in outdoor environments.
Chemical Composition (%)
| Element | Content |
|---|---|
| C | ≤ 0.13 |
| Si | 0.10 – 0.40 |
| Mn | 0.20 – 0.60 |
| P | ≤ 0.030 |
| S | ≤ 0.030 |
| Cu | 0.25 – 0.55 |
| Cr | 0.40 – 0.80 |
| Ni | ≤ 0.65 |
Key Features
Superior Weather Resistance – Naturally forms a dense oxide layer that slows corrosion, even in harsh outdoor environments.
Excellent Mechanical Properties – Strong yield and tensile strength with good elongation and toughness.
Good Workability – Easy to cut, bend, weld, and form; supports laser cutting and customized processing.
Decorative Rust Finish – Develops a unique rustic appearance over time, perfect for architectural and landscape applications.
Cost-Effective Durability – Reduced maintenance and painting frequency over the service life.
Working Principle
Through micro-alloying with elements like phosphorus, copper, chromium, and nickel, Q235NH Weathering Steel Plate forms a dense, adherent oxide layer (50μm–100μm thick) that prevents further ingress of oxygen and moisture, effectively reducing the corrosion rate and protecting the base metal.
Applications of Q235NH Weathering Steel Plate
Building Structures – Beams, columns, and load-bearing frameworks.
Bridges and Towers – Structural components requiring long-term outdoor durability.
Containers – Shipping containers, storage tanks, and workshop units.
Railway & Transportation – Railcars, chassis, and guardrails.
Industrial Equipment – Chimneys, pressure vessels, oil and gas pipelines.
Landscape & Architecture – Facades, sculptures, and outdoor installations.
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