Corten Steel – Weathering Steel for Long-Lasting Structural Beauty Corten Steel, also known as weathering steel, is a high-strength, corrosion-resistant alloy designed to naturally form a protective oxide layer on its surface when exposed to atmospheric conditions. This self-protecting rust layer prevents further corrosion and gives the steel its signature warm, earthy appearance, making it both durable and visually striking. Used extensively in architectural structures, infrastructure projects, and industrial applications, Corten steel eliminates the need for painting or surface treatment — making it a low-maintenance, long-life material for outdoor use. Why Choose Corten Steel? Natural weather-resistance – the outer layer acts as a shield No need for paint or coatings – cost-effective and eco-friendly Attractive patina finish – ideal for design and architecture Good weldability and structural strength Withstands harsh outdoor and urban environments Grades Available: Corten A – Phosphorus-enhanced for improved corrosion resistance; often used in architecture and facades Corten B – Designed for structural applications with better impact and tensile strength; ideal for bridges and equipment Typical Composition: Element Corten A (%) Corten B (%) Carbon (C) ≤ 0.12 ≤ 0.16 Manganese 0.20–0.50 0.40–0.65 Phosphorus 0.07–0.15 ≤ 0.035 Sulfur ≤ 0.03 ≤ 0.03 Chromium 0.50–1.25 0.40–0.70 Copper 0.25–0.55 0.25–0.40 Mechanical Properties: Property Corten A Corten B Yield Strength ~345 MPa ~355 MPa Tensile Strength ~470–630 MPa ~485–620 MPa Elongation ≥ 20% ≥ 19% Common Applications: Building facades, cladding, and architectural sculptures Bridges, railcars, and transport infrastructure Garden planters, fencing, and outdoor furniture Chimneys, signage, and artwork installations Equipment operating in marine or coastal climates Conclusion: Corten Steel brings together the strength of structural steel and the natural resilience of a weathered surface. It’s the material of choice for those seeking durability, sustainability, and distinct visual character in exterior and exposed structures. Whether you're designing an urban façade or a heavy-duty industrial frame, Corten ensures performance without compromise.