The high mechanical resistance values of corten steel allow for small sections and therefore with a lower visual impact and higher indoor brightness while, at the same time, making it possible to realise large and heavy doors and windows with excellent performance. Corten steel is a high-resistance self-passivating alloy containing copper, chrome  and  phosphorus, characterised by a high resistance to corrosion and to tensile yield; these alloys are self-protective through the formation of a superficial coating that prevents the