Gnee steel group is a supply chain integrated enterprise including steel plate, coil, profile, outdoor landscape design and processing. Founded in 2008, with 5 million RMB registered capital, Gnee has made impressive progress and development in steel market with Gnee People more than 10 years hard fighting.
Since its development, Cor-Ten1 has captivated the imagination of designers. The beautiful and ever-changing of Cor-Ten surfaces create an on-going visual dialogue with their environment, evolving as time goes by. Most of what makes Cor-Ten great is the rusting effect. When Cor-ten is exposed to the atmosphere, it develops an ordinary layer of rust. But, as time passes by, this early product gradually converts to a protective and fine-textured rust that adheres to the base metal developing a beautiful patina that both protects the base metal and supresses further corrosion. The marvellous paradox of weathering steel is that rust cures rust. Cor-Ten steel is versatile and can be used for façade or roof applications. It is easily formable and allows to be used for architectural elements of all shapes with minimal constraints. Surfaces can be flattened, curved or faceted. They can be expanded, perforated or embossed with different patterns to create architecturally distinguished facades with an elegantly natural brown patined texture. This publication aims to provide you with a good understanding of Cor-Ten steel for application in facades. We have also included several examples of successful projects realised in Cor-Ten steel to inspire your future projects. At GNEE, we enjoy working in partnership with designers, contractors and clients to materialise innovative projects.
Cor-Ten steel, which comes from Corrosion resistance and Tensile strength, is used in architectural and art applications, for both outdoor and indoor conditions, without any separate surface treatment. Use of weather-resistant steel thus eliminates the need for surface treatments during the manufacturing and operational periods, in turn lowering the environmental impact and costs throughout the product’s life cycle. The corrosion retarding effect of the protective layer is produced by the nature of its structure composition and the particular distribution and concentration of alloying elements. Cor-Ten steel is mainly an iron-carbon alloy which includes copper also chromium, nickel, phosphorus, silicon and manganese comprising all of them less than 5% of the total metallurgic composition. The characteristics are specified in the European standard EN 10025-5 and in the American standard ASTM G101:4. When utilising Cor-Ten, it is required to account for the expected loss of thickness due to corrosion, and as far as necessary, compensate for it by increasing the thickness of the material depending on the durability requirements. In this sense, the annual steel loss due to corrosion for a C4 environment (industrial and coastal areas) is estimated as a linear function and accounts for 0.02 mm/year during the first two (2) years.