![]() Weathering steels, such as ASTM A588, A242, A606 and COR-TEN ® exhibit superior corrosion resistance over regular carbon steel as a result of the development of a protective oxide film on the metals surface which slows down further corrosion. If you want COR-TEN ® this will be the best available option. When someone needs COR-TEN ® they are normally referring to A606 Type 4 or A588. If the answer is ” No ” or ” I don’t know ” it’s almost certainly NOT COR-TEN ®. Simply ask them if their steel was purchased from U.S. If somebody tells you that they are supplying you COR-TEN® they are almost certainly unaware of their own product. What is available is steel in an A606-4 or an A588 finish. In simple terms the steel is allowed to rust and that rust forms a protective coating that slows the rate of future corrosion. COR-TEN ® resists the corrosive effects of rain, snow, ice, fog, and other meteorological conditions by forming a coating of dark brown oxidation over the metal, which inhibits deeper penetration and negates the need for painting and costly rust-prevention maintenance over the years. Weathering steel has increased resistance to atmospheric corrosion when compared to other steels. Weathering steel, best-known under the trademark COR-TEN ® steel, is a group of steel alloys which were developed to obviate the need for painting, and form a stable rust-like appearance if exposed to the weather for several years. ![]() Its unique look and naturally oxidizing finish make it especially desirable for many architectural projects. COR-TEN ® steel is becoming more popular by roll formed product end-users. Consulting with experts in materials and design can ensure you make the right selection for your specific application.COR-TEN ® is a trademarked name owned by U.S. The choice between the two grades should be based on factors such as project requirements, availability, and design preferences. In summary, both Corten A and Corten B are excellent choices for projects requiring weathering steel properties and a distinctive appearance. Consulting with a materials expert or engineer can help determine which grade is most suitable for your application. Project Requirements: Consider the specific requirements of your project, including structural needs and environmental conditions. In some regions, one grade may be more readily available than the other. The choice between the two may come down to the specific hue and texture desired for the project.Īvailability: Availability may vary depending on your location and supplier. The formation of the protective rust layer is a key feature of both grades.Īesthetic Appeal: Both grades develop the characteristic rust patina, giving them their signature appearance. The choice between Corten A and Corten B may depend on factors such as availability, project requirements, and design preferences.Ĭorrosion Resistance: Both Corten A and Corten B offer excellent corrosion resistance when exposed to outdoor conditions. It forms a protective rust layer when exposed to the elements, which provides corrosion resistance and a unique appearance.Īpplications: Corten B is used in similar applications as Corten A, particularly in structural and architectural projects. Weathering Properties: Corten B shares the same weathering characteristics as Corten A. However, Corten B has a higher phosphorus content. It contains small amounts of copper, chromium, nickel, and phosphorus, similar to Corten A. Its aesthetic appeal, combined with its corrosion resistance, makes it a popular choice for outdoor and exposed environments.Ĭhemical Composition: Corten B has a slightly different chemical composition compared to Corten A. This patina acts as a barrier against atmospheric corrosion and can extend the material’s lifespan.Īpplications: Corten A is commonly used in architectural applications, outdoor sculptures, cladding, and structural components. When exposed to the elements, it develops a protective layer of rust on the surface, which not only prevents further corrosion but also gives the steel its distinctive reddish-brown appearance. Weathering Properties: Corten A is known for its excellent weathering properties. The presence of these alloying elements enhances the steel’s resistance to atmospheric corrosion. Selecting the right grade of Corten steel is crucial when working with this material, as it can impact the final appearance and performance of your project.Ĭhemical Composition: Corten A is primarily composed of iron, with small amounts of copper, chromium, nickel, and phosphorus. Understanding Corten Steel Grades – Corten A vs. ![]() Below, we’ll explore the differences between these two grades: The two most recognized grades used for Corten are Corten A and Corten B. ![]() Corten steel is often associated with its weathering steel properties, but there are different grades within the Corten family.
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