experiment set-up Urheberrecht: © STB

Application of duplex stainless steel for welded bridge construction in aggressive environment

Short description

Aim of this project was to evaluate the possibility to use high strength and corrosion resistant steels like duplex stainless steel in an economic efficient way for bridge construction in an aggressive environment.
The general objective was to verify a technical and economical feasibility of welded bridge constructions using in particular EN 1.4462 (22Cr5Ni3MoN) duplex stainless steel having S480 nominal strength class (according to ENV 1993-1-4). Another objective was to give first indications suitable to provide a basis of an upgrade of Eurocode 3 towards stainless steel bridges.
In particular, specific goals were:

- Specify welding technologies/procedures for duplex stainless steel bridges to achieve the performances required for this kind of welded structure
- Evaluating mechanical and corrosion behaviour of few critical welded details by means of mechanical and corrosion testing and also numerical analysis. Data obtained was compared with experimental data already existing for carbon steels
- Suggestions of Eurocode 3 revisions/implementations
- Performing detailed and reliable Life Cycle Cost Analysis (LCCA) on basis of a case study. For this purpose the Verrand Viaduct in Italy constructed by OMBA was investigated, a continuous beam closed box girder steel bridge.

Research program

RFCS - Research Fund for Coal and Steel


Duration of project

07/2004 - 06/2006

Contact person

Markus Feldmann