Weathering steel
COR- TEN steel (also: Corten steel or Corten steel ) is the trade name for a weathering steel.
Properties and Uses
COR-TEN steels are made on the surface by weathering, under the actual rust layer, a particularly dense barrier layer of adherent sulfates or phosphates, which protects the component from further corrosion.
A distinction is made between Corten A and B. Corten A Corten ASTM A 242, material No. 1.8946, EN 10027-1: S355J2WP corresponds to a weatherproof, phosphorlegierten structural steel. The thickness range is limited to less than 100 mm because of poor weldability and formability worse. The use phosphorlegierter structural steels is not regulated by the building in Germany. Any use requires, because of the lack of general type approval, therefore the application for an " individual approval ".
Corten B ASTM A 588 material No. 1.8963, EN 10027-1: S 355J2W is not phosphorlegiert, officially approved, has good weldability and good cold and hot workability. The steel is used for welded, bolted structures, eg in the steel building and bridge construction, the construction of reservoirs, for ISO containers, as well as in plant construction.
Due to its insensitivity to the effects of weathering and its characteristic patina COR- TEN steel is also used for accents in the architecture, such as for facade cladding. Many sculptors use the material for sculptures outdoors.
History
The American Byramji D. Saklatwalla reported a steel alloy with alloy additives of copper, phosphorus, silicon, nickel and chromium in 1932 for a patent. The United States Steel Corporation developed the steel, which is characterized by high weather resistance, further and gave the new material, with the approximate additional alloying shares 0.8 % of Cr, 0.5 % Ni, 0.5 % Cu, 0.1% P the name COR- TEN steel. The name is composed of the first syllable COR for rust resistance ( corrosion resistance) and the second syllable of the tensile strength ( tensile strength ). The first German company smelters Oberhausen AG started in early 1959 in the production of COR- TEN steel.
The historical process for the preparation of rusted steel produced a material which had similar properties. A prominent example is in Germany the Griethausen railway bridge near Kleve, which has hardly any corrosion damage despite lack of protective paint.
Sculpture Shield of Hannes Meinhard on Landeskriminalamt Lower Saxony
West facade of the main building of the State Office Information and Technology NRW ( Dusseldorf )
The Porta dels Països Catalans by Emili Armengol
Christoph Mancke: The Roof (2003, Speyer ) before the German Pension Insurance Rhineland -Palatinate
Facade of the house of the Essenes History - City Archives (2009, Essen)
Georg- Elser Memorial Friedrich Frankowitsch (2010, Königsbronn )
Lookout tower Rusty Nail from weather -grade structural steel on Sornoer channel
Corten steel facade of memory 7 (2013, Mannheim)