Duplex stainless steels are increasingly used as structural materials in building and architecture because of their exceptional mechanical properties. Their room temperature yield strength in the solution annealed condition is more than twice that of standard austenitic stainless steels not alloyed with nitrogen. Over the last few years, they have started playing an increasingly important role in the construction of bridges, wherever specific environmental conditions combine with the need for high load-bearing capability. Duplex stainless steels are mostly selected because of their combination of high strength and corrosion resistance. Their full potential is used in locations where the material comes into contact with salt water, or where high concentrations of chlorides are present in the ambient air or where de-icing salts are of a concern. The higher initial costs involved in choosing duplex stainless steel as compared to conventional structural steel are more than compensated by longer life span and significantly lower maintenance and repair costs. Their full recyclability makes them more sustainable than non-metallic solutions. Several recent examples of using duplex stainless steels in bridge construction are presented.
Sustanaible duplex stainless steel bridges
Nachhaltige Entwicklung von Brücken aus nichtrostendem Duplex-Stahl
2010
12 Seiten, 7 Bilder, 2 Tabellen, 7 Quellen
Conference paper
English
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