Innovative façade solutions with corten steel
Corten steel is a very popular material for façades on buildings, for art and landscape architecture.
Its shimmering brown colour and the many ways of processing it, as plane plates or as expanded metal, give the architects free reins.
CORROSION-RETARDING EFFECT IN SPITE OF OUTER RUST LAYER
A protective outer layer is rapidly formed on the surface of the corten steel but the subsequent forming of rust is four to eight times slower than on other steels as long as the corten steel is regularly allowed to dry out completely.
Thus, as for all other types of steel facing, corten is a façade type which has limitations in lifetime depending on location, e.g. costal areas, light/shadow and moisture.
TOLERATES HIGH TEMPERATURES
Corten steel tolerates high temperatures and has a lower coefficient of expansion than ordinary steel. Therefore, corten steel is also used for tasks where special considerations as regards temperature have to be observed, for instance fireplaces, smokestacks etc.
- Corten steel is described as weathering steel as it has an increased resistance to atmospheric corrosion.
- Comes in two types, Corten A og Corten B which has a lower content of phosphorus.
- Common thicknesses:
- Corten A – up to 13 mm, sometimes up to 75 mm, also available as cold rolled sheet metal
- Corten B – 13 to 100 mm
- The alloy consists of 1.2% chromium plus a little cobber, phosphorus and nickel (stainless steel alloy contains 12% chromium).
- Can be welded, perforated, stretched and bent.
- The stretch limit is approx. 340 N/mm2.