Duplex stainless steel is used in architecture for structural and decorative elements, particularly pedestrian bridges, façades and curtain walling, where its high strength, corrosion resistance and appearance suit exposed and coastal settings. It extends service life and cuts maintenance while providing a sleek, modern finish.
Although stainless steel has been used for nearly a hundred years, higher-performance duplex grades have only been commercially available since the 1980s. Their use by architects, designers and building contractors has grown in recent years, combining practical benefits, safety and structural integrity with an aesthetic role, using a slim, shiny form to make a statement. Few materials combine style and strength so readily.
Duplex stainless steel complements structures that use modern glazing and curtain walling, with each reflecting the other and adding depth to the overall composition.
It is a popular material for pedestrian bridges, allowing curved structures with strong aesthetic appeal. The best-known example is the iconic Helix Bridge in Marina Bay, Singapore, and the number of references continues to grow as such projects are completed around the world.
The characteristics of duplex steel
The composition of duplex steel makes it generally twice as strong as austenitic or ferritic stainless steels. These higher-strength alloys can support greater loads and span larger distances while keeping a slim, elegant form.
Its durability makes it a sensible choice for challenging environments. Many bridges sit near a coastline or estuary, with greater exposure to salt-laden air. Duplex stainless steels reduce routine maintenance and help retain the original appearance for far longer.
Stainless steel is readily recyclable, helped by its ease of traceability and inherent value. This reduces the overall environmental impact of a structure, an important factor in the choice of materials.
We have a clear focus on the supply of duplex and super duplex stainless steels. Our wide range of solid bar sizes and depth of stock lets us supply many different projects, including the fabrication of rigging and suspension systems such as connectors, couplings and chain plates.