Q345GNH Corten Steel Plate

Q345GNH is a high-strength low-alloy atmospheric corrosion-resistant steel developed according to Chinese standard GB/T 4171. As a member of the Corten steel family, it forms a stable, protective rust layer that eliminates the need for painting under most outdoor conditions.

With a minimum yield strength of 345 MPa, Q345GNH is a reliable structural material suitable for bridges, buildings, shipping containers, urban landscapes, and steel facades. It offers good weldability, formability, and long-term corrosion resistance in variable weather environments.

🔍 Key Features

• Weather-Resistant Patina: Natural anti-corrosion layer develops over time

• Structural Grade: Yield strength ≥ 345 MPa

• Welding Friendly: Excellent performance in fabrication and welding

• Low Maintenance: No painting needed, even in industrial environments

• Aesthetic Appeal: Rustic surface ideal for modern architecture

📌 Applications

• Outdoor bridges and urban infrastructure

• Steel frames in open-air environments

• Railway transport and shipping containers

• Architectural facades and corten cladding

• Garden corten edging, screens, and walls

⚙️ Technical Specifications

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

📦 Supply Options

• Form: Plate, sheet, coil

• Delivery: As-rolled or normalized

• Processing: Cutting, bending, pre-rusting, welding

• Certification: GB/T 4171 + optional SGS/BV/EN10204 3.1