Perforated Corten steel sheets, also known as Corten perforated panels, are specialized weathering steel products designed for both architectural and structural applications.
They combine the strength and durability of Corten steel with the design versatility of perforations, allowing airflow, light passage, and aesthetic customization without compromising structural integrity.
This material is widely used in industrial, commercial, and residential projects, particularly in areas exposed to harsh weather conditions.
Key Features of Perforated Corten Steel Sheets
Sheet Thickness: 2 – 460 mm
Surface Finish: Rough, bright, natural rust patina, pre-rusted, powder coated, painted, galvanized
Delivery Condition: Annealed, heat-treated
Edge Types: 45° corner, 90° corner, half circle, straight edge, square end, quarter circle
Process Capabilities: Deburring, edging, grinding, bending, beveling, forging, rolling, shearing, forming, machining, pickling, welding
Mechanical Properties: High tensile strength, good weldability, impact resistance
Certification: MTC according to EN 10204 3.1
Maintenance: Minimal, due to protective rust patina
Versatility: Can be used for roofing, façades, screens, ceilings, soffits, and more
Dimensions & Sizes
| Parameter | Range / Options |
|---|---|
| Thickness | 2 – 460 mm |
| Length | 1000 – 12000 mm |
| Width | 900 – 3200 mm |
| Standard Gauges | 11, 16, 22 |
| Perforation Diameter | 1.6 – 25.4 mm |
| Open Area | 23% – 63% |
| Finish | Bright, Rusted, Patina Rust, Powder Coated, PE Coated, Black Painted, Anti-Rust Oiled |
Examples of Dimensions for Facades:
| Thickness (mm) | Finish | Sheet Size (mm) |
|---|---|---|
| 0.8 | Bright | 3000 × 1110 |
| 0.8 | Rusted | 3000 × 1110 |
| 0.8 – 3.0 | Patina Rust | 3000 × 1500, 2500 × 1250 |
| 1 | Patina Rust | 2500 × 1250 |
| 1 | Bright | 2500 × 1250 |
Chemical Composition
| Grade | C (%) Max | P (%) | S (%) Max | Cr (%) | Cu (%) | Ni (%) Max | Mn (%) | Si (%) |
|---|---|---|---|---|---|---|---|---|
| ASTM 588 GR A | 0.12 | 0.07–0.15 | 0.03 | 0.50–1.25 | 0.25–0.55 | 0.65 | 0.20–0.50 | 0.25–0.75 |
| Corten-A | 0.12 | 0.07–0.15 | 0.03 | 0.50–1.25 | 0.25–0.55 | 0.65 | 0.20–0.50 | 0.25–0.75 |
| ASTM 242 TYPE-1 | 0.15 | 0.15 | 0.05 | 0.25–0.40 | 0.20 Min | – | 1 | – |
Perforation Specifications
| Pitch (mm) | Open Area (%) | Hole Size (mm) |
|---|---|---|
| 9.55 | 40 | 6.35 |
| 12.7 | 23 | 6.35 |
| 17.27 | 49 | 12.7 |
| 25.4 | 51 | 19.05 |
| 30 | 63 | 25.4 |
| 3.66 | 40 | 2.41 |
| 6.1 | 25 | 3.2 |
| 5.59 | 30 | 3.2 |
| 2.54 | 36 | 1.6 |
These perforation patterns can be customized for architectural design, airflow, light diffusion, or decorative aesthetics.
Perforated Corten steel sheets are highly versatile and widely used in architectural and industrial applications. Beyond the standard product, a range of value-added services ensures that each sheet can be customized to meet specific project requirements. Below is a detailed breakdown.
Value-Added Services
| Service | Description | Technical Data / Notes |
|---|---|---|
| Bending | Metal sheets can be bent to curved or angled shapes for architectural and structural purposes | Min. bending radius: 1.5×thickness; Max bending angle: 180° |
| Beveling | Edge preparation for welding or aesthetic purposes | Typical bevel angles: 30°–45°; Tolerance ±0.5° |
| Forging | Local deformation for high-strength applications | Applicable for thickness ≤ 200 mm |
| Rolling | Plate rolling for curved panels or cylindrical structures | Min. diameter: 500 mm; Max. thickness: 25 mm |
| Shearing | Cutting large plates into custom sizes | Max plate size: 3200 × 12000 mm; Tolerance ±1 mm |
| Cutting & Machining | CNC laser cutting, plasma cutting, waterjet cutting, precision machining | Hole diameter range: 1.6–25 mm; Accuracy ±0.1 mm |
| Grinding & Deburring | Smooths edges for safety and appearance | Surface roughness Ra ≤ 1.6 μm |
| Pickling & Stabilization | Accelerates formation of protective rust patina, reduces early runoff staining | Patina stabilization: 2–6 months depending on weather |
| Welding | GMAW, SAW, GTAW, Plasma welding available | Compatible with ASTM A588 GR A/B; Heat input: 0.5–1.2 kJ/mm |
| Finishing Options | Powder coating, painting, galvanizing, natural rust finish | Powder thickness: 60–100 μm; Galvanizing thickness: 80–120 μm |
Tip: Pre-stabilized Corten panels reduce early-stage rust runoff and maintain a uniform patina, making them ideal for façades and cladding in urban environments.
Applications
Perforated Corten steel sheets are suitable for both functional and decorative applications:
| Application | Description | Typical Dimensions / Specs |
|---|---|---|
| Architectural Façades | Exterior and interior wall cladding with perforations for design and ventilation | Thickness: 0.8–6 mm; Width: 1200–3200 mm |
| Roofing & Ceilings | Provides natural ventilation and weather protection | Max span: 6 m; Open area: 23–63% depending on perforation pattern |
| Screening & Privacy Panels | Decorative privacy solutions for gardens, terraces, and commercial spaces | Hole diameter: 3–20 mm; Patterns: round, square, custom |
| Column Covers & Canopies | Enhances structural aesthetics and weather resistance | Curvature: min radius 500 mm; Thickness: 2–10 mm |
| Industrial Applications | Bridges, walkways, stair treads, drainage panels | Thickness: 6–25 mm; High tensile strength ≥ 450 MPa |
| Interior Design | Partition walls, decorative panels, furniture accents | Max sheet size: 2500 × 1500 mm; Patina finish optional |
Advantages of Perforated Corten Steel
Perforated Corten steel sheets offer significant technical and aesthetic benefits:
| Advantage | Description | Data / Benchmark |
|---|---|---|
| High Strength & Durability | Resistant to mechanical impact, corrosion, and atmospheric weathering | Yield strength: 345–470 MPa; Tensile strength: 470–630 MPa |
| Low Maintenance | Protective rust patina eliminates the need for frequent painting | Typical lifespan: 50+ years in outdoor applications |
| Sustainable Material | Long service life reduces material waste and replacement frequency | CO₂ footprint lower than repeated painting/maintenance cycles |
| Customizable Designs | Hole size, pattern, thickness, and finish can be tailored | Perforation: 1.6–25 mm; Open area: 23–63% |
| Global Availability | Manufactured according to Japanese, European, American, Korean, and Indian standards | ASTM A588, JIS G3125 SPA-H/SPA-C, EN 10025 |
Perforated Corten steel sheets are versatile, long-lasting, and visually striking, offering a combination of architectural beauty, structural performance, and environmental sustainability.
From façades and roofing to screens and artistic installations, perforated Corten steel provides design flexibility, high strength, and corrosion resistance.
Advanced fabrication, cutting, and finishing options ensure each panel meets precise project specifications, while pre-stabilization guarantees a consistent patina finish over time.
