Perforated Corten steel sheets supplied by Gnee are robust, long-lasting, and highly adaptable for various architectural and structural applications.
While Corten steel is significantly heavier than aluminium, its superior strength and durability make it an excellent choice for façades, flooring, screens, and public installations.
Also referred to as weathering steel, Corten forms a self-protective oxide layer (patina) when exposed to atmospheric conditions. This oxidized surface layer prevents further corrosion, ensuring long-term performance in outdoor environments.
Different grades and finishes are available:
ASTM A588 Grade B Perforated Corten Sheet – ideal for structural applications
Polished or pre-weathered sheets – suitable for decorative architectural uses
Corten steel sheets are classified as Grade A and B based on their composition and mechanical properties. The panels undergo a stabilization process before installation to reduce rust runoff in the early weathering phase.
Techniques like pickling can accelerate the patina formation, typically taking 2–6 months. Ordering pre-stabilized sheets is recommended to ensure a uniform appearance.
Advantages of Perforated Corten Steel
Textured Surface After Weathering: Corrosion creates a concrete-like texture that improves grip and drainage, ideal for perforated flooring and outdoor surfaces.
High Tensile Strength: With tensile strength up to 630 MPa and yield strength ≥ 355 MPa, Corten is stronger than conventional carbon steel, perfect for structural applications, fencing, and sculptural installations.
Workability: Easily cut, perforated, formed, and welded to suit custom designs.
Long Service Life: Resistant to atmospheric corrosion, capable of 20–50 years of outdoor performance.
Technical Specifications
| Specification | Details | Data / Range |
|---|---|---|
| Material | Corten / Weathering Steel | ASTM A588 Grade B / SPA-H / JIS G3125 |
| Panel Thickness | Steel Plate Thickness | 1.5–6 mm |
| Width | Maximum Panel Width | Up to 1200 mm |
| Length | Maximum Panel Length | Customizable, up to 6 m |
| Hole Diameter | Perforation Size | 3–20 mm (customizable) |
| Hole Pattern | Shape | Round, square, or custom patterns |
| Open Area | Perforation Ratio | 10–30% |
| Yield Strength | ReH | ≥ 355 MPa |
| Tensile Strength | Rm | 470–630 MPa |
| Elongation | A% | ≥ 20% |
| Weight | Approximate Panel Weight | 25–35 kg/m² (depending on thickness) |
| Surface Finish | Finish Options | Natural rust patina, pre-rusted, polished |
| Stabilization | Pre-Installation Treatment | 2–6 months of weathering or pickling |
| Applications | Typical Uses | Flooring, fencing, screens, façades, sculptural installations |
| Service Life | Outdoor Durability | 20–50 years in standard atmospheric conditions |
Applications
Perforated Flooring: Textured surface ensures drainage, safety, and grip.
Architectural Screens & Façades: Creates light-permeable, ventilated, and visually appealing walls.
Fencing & Barriers: Combines structural strength with aesthetic industrial design.
Public Art & Sculptures: Durable for outdoor installations, maintaining visual appeal over decades.
Custom Panels & Decorative Elements: Can be cut, bent, and welded into bespoke patterns for unique architectural features.
Perforated Corten steel sheets offer a perfect balance of strength, durability, and design flexibility. With customizable perforations, high tensile performance, and self-protective corrosion resistance, these sheets are ideal for architectural façades, outdoor flooring, fencing, and artistic installations.
Pre-stabilization ensures uniform rust patina and long-lasting performance, making Corten steel a reliable and aesthetically striking choice for modern design and construction projects.
