Weathering Steel Plates – Built-In Protection Against the Elements Weathering Steel Plates, including grades like Corten A and Corten B, are designed to offer superior resistance to atmospheric corrosion without the need for protective coatings. These steels develop a stable, rust-colored patina over time, which shields the material from further corrosion and gives it a distinctive aesthetic appeal. With the addition of elements like copper, chromium, and phosphorus, weathering steel exhibits enhanced durability and reduced oxidation rates in open environments. This makes it a preferred material for structures exposed to changing weather and architectural projects where appearance and performance go hand-in-hand. Distinct Advantages: Naturally corrosion-resistant – no paint required Forms a self-protecting surface layer upon exposure Offers aesthetic appeal with rustic tones Excellent for outdoor, coastal, or humid environments Easy to fabricate, bend, and weld Typical Chemistry (Corten A): Element Percentage (%) Cu 0.25 – 0.55 Cr 0.50 – 1.25 Ni up to 0.65 P up to 0.15 C ≤ 0.12 Mechanical Characteristics: Specification Corten A Corten B Yield Strength ~345 MPa ~355 MPa Tensile Strength ~470–630 MPa ~485–620 MPa Elongation ~20% ~19% Usage Sectors: Bridges, building facades, and outdoor structures Shipping containers, trailers, and rail cars Public installations and sculptures Weather-exposed beams, poles, and support systems Landscaping elements and site furniture Conclusion: Weather-resistant plates combine technical reliability with visual impact, making them a go-to choice for architects, engineers, and designers seeking low-maintenance longevity in harsh environments. Their evolving surface and corrosion resistance reflect both functionality and form.