Q355NH Corten Steel Plate

Q355NH is a corten steel plate developed under GB/T 4171, designed for enhanced resistance to atmospheric corrosion and higher yield strength compared to Q295 or Q345 series. It is commonly referred to as Chinese Corten steel and is widely used in bridges, buildings, landscaping, and steel art installations.

With a yield strength ≥ 355 MPa, Q355NH is ideal for medium to heavy-duty outdoor structures requiring long service life with minimal maintenance.

✅ Key Advantages

• High Strength Weathering Steel – Stronger than Q295NH/Q345GNH

• Natural Rust Finish – Self-protecting surface against corrosion

• Excellent Durability – Performs in industrial and marine atmospheres

• Weldable and Machinable – Easy to fabricate and process

• Aesthetic + Functional – Ideal for landscape and structural use

🏗 Typical Applications

• Weathering steel bridge components

• Container and freight structures

• Outdoor steel sculptures and walls

• Garden and park corten edging

• Decorative corten planter boxes and signs

⚙️ Mechanical Properties

Chemical Composition (Typical):

• C ≤ 0.12

• Mn: 0.20–1.60

• Si: 0.25–0.75

• P: 0.07–0.15

• S ≤ 0.03

• Cu: 0.25–0.55

• Cr: 0.40–0.70

• Ni: 0.20–0.50

📦 Delivery Details

• Available in: Plate, sheet, strip

• Standard size or custom dimensions

• Pre-weathered surface available on request

• Optional services: plasma cutting, oiling, pickling, CNC shaping