Weathering steel
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Weathering steel, often called corten steel (or its trademarked name, COR-TEN) is a group of steel alloys that form a stable external layer of rust that eliminates the need for painting.
U.S. Steel (USS) holds the registered trademark on the name COR-TEN.[1] The name COR-TEN refers to the two distinguishing properties of this type of steel: corrosion resistance and tensile strength.[2] Although USS sold its discrete plate business to International Steel Group (now ArcelorMittal) in 2003,[3] it makes COR-TEN branded material in strip mill plate and sheet forms.
The original COR-TEN received the standard designation A242 (COR-TEN A) from the ASTM International standards group. Newer ASTM grades are A588 (COR-TEN B) and A606 for thin sheet. All of the alloys are in common production and use.
The surface oxidation generally takes six months to develop, although surface treatments can accelerate this to as little as one hour.[4]
- ^ "Trademarks and Ownership". USS. Retrieved 13 June 2017.
- ^ "Weathering Steel: A Guide to Corten and the A/B Equivalents, Origins & Standards". AZoM.com. 4 July 2016.
- ^ Plate Products, 31 October 2003, archived from the original on 28 December 2007, retrieved 13 January 2010
- ^ "Corten+ US". Corten+ | Rust accelerator. Retrieved 20 November 2021.
The Corten+ treatment products form a rust in one hour