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The main requirement for bridges structure steels includes minimum yield strength level & good toughness. In addition good weldability & corrosion resistance is desirable.
Indaten® range of steels with improved resistance to atmospheric corrosion meeting requirements of the EN 10025-5:2004 standard. These grades are fine-grain, high-strength structural steels that have been optimised to give improved processing and in-service performance. With their characteristic colour, Indaten® steels are used in bridge construction to harmonise with the environment or to create a pleasing contrast with other materials.
When used uncoated and exposed to weather, an oxide layer develops on the steel surface, forming a purplish-brown, finely grained patina that bonds very strongly to the steel and protects it. If the patina is damaged, the steel re-oxidises, thus repairing the patina and maintaining the protective barrier.
Indaten® 355 can also be coated (paint, metallic coatings etc). In the case of coated parts, the protective layer prevents rust propagation under the paint layer. Indaten® has excellent weldability with all the usual welding processes thanks to its low carbon content and fine-grained structure.
