Weathering steel, commonly known by the trademark COR-TEN, is a high-strength, low-alloy steel that forms a stable, rust-like appearance when exposed to the elements. This protective patina not only provides an appealing aesthetic but also enhances the steel’s resistance to atmospheric corrosion, making it ideal for various architectural and structural applications.
Key Features of Weathering Steel
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Self-Protecting Patina: Develops a stable rust layer that shields the material from further corrosion.
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Low Maintenance: Eliminates the need for painting or regular upkeep.
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Enhanced Durability: Offers superior strength and longevity compared to traditional steels.
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Aesthetic Appeal: The evolving patina provides a distinctive, rustic look favored in modern architecture.
Common Applications
Weathering steel’s unique properties make it suitable for:
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Bridges and overpasses
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Building facades and cladding
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Sculptures and public art installations
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Landscaping and garden structures
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Railcars and shipping containers
Weathering Steel Grades Comparison
| Grade | Yield Strength (ksi) | Tensile Strength (ksi) | Common Forms | Typical Applications |
|---|---|---|---|---|
| ASTM A588 | 50 | 70 | Plate, Structural | Bridges, Buildings, Structural Components |
| ASTM A606-4 | 50 | 70 | Sheet, Coil | Roofing, Siding, Architectural Panels |
| ASTM A871-65 | 65 | 80 | Plate | Tubular Structures, Poles |
| ASTM A847 | 50 | 70 | Tube, Pipe | Structural Tubing, Architectural Applications |
Step-by-Step Guide: Working with Weathering Steel
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Material Selection: Choose the appropriate grade based on structural requirements and environmental exposure.
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Design Considerations: Ensure proper detailing to allow for water drainage and air circulation, facilitating uniform patina development.
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Fabrication: Use compatible welding materials and techniques to maintain corrosion resistance.
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Installation: Avoid trapping moisture between surfaces; use spacers if necessary.
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Maintenance: Generally minimal; however, periodic inspections ensure the patina is forming correctly and uniformly.
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Luo Kaiwei Steel Company is a multi-ISO certified steel manufacturer specializing in carbon steel plates, pipes and galvanized coils since 2010. Competitive prices and ASTM/JIS compliant. Get instant quotes for bulk orders and global shipping support.