CORTEN B (Weather-Resistant Structural Steel Plate) CORTEN B is a high-strength, low-alloy, weather-resistant steel developed for structural applications requiring superior toughness and resistance to atmospheric corrosion. Unlike CORTEN A, which is optimized for architectural use, CORTEN B is engineered for more demanding load-bearing structures where mechanical strength and durability are essential. Designed to form a stable rust-like patina when exposed to the elements, CORTEN B naturally resists further corrosion without the need for protective coatings—making it a low-maintenance solution in harsh outdoor environments. Key Features: Enhanced Atmospheric Corrosion Resistance: Alloying elements like copper, nickel, and chromium facilitate the formation of a self-protecting oxide layer that prevents deeper rust penetration. Greater Mechanical Strength Compared to CORTEN A: Higher yield and tensile strength make it well-suited for structural and industrial applications. Excellent Weldability and Formability: Compatible with standard welding and fabrication methods, enabling ease of processing. Cost-Effective and Sustainable: Eliminates the need for painting, reducing maintenance costs and environmental impact over time. Stable Aesthetic Finish: Over time, it develops a deep, earthy tone that enhances the visual character of industrial and infrastructure projects. Mechanical Properties of CORTEN B: Property Value Yield Strength ≥ 355 MPa Tensile Strength 485–620 MPa Elongation ≥ 19% Corrosion Resistance Enhanced through copper, nickel, and chromium alloying Common Applications: Bridges and Heavy Infrastructure: Structural components in pedestrian walkways, overpasses, and railway bridges. Industrial Storage Systems: Silos, hoppers, and tanks exposed to outdoor weather or corrosive environments. Shipping and Container Industries: Used in cargo containers and transport frames where long-term exposure to marine climates occurs. Structural Fabrications: Load-bearing frameworks in architectural and civil engineering projects. Power Plants and Chimney Stacks: Ideal for high-heat, high-corrosion applications in energy and processing plants. Conclusion: CORTEN B is the go-to choice for structural applications where durability, mechanical strength, and weather resistance are paramount. Its long service life, low maintenance profile, and ability to withstand aggressive environments make it a smart and sustainable option for industrial and infrastructural use.