Recent developments of stainless steels in structural applications
Andrew Backhouse, Nancy Baddoo
Abstract
Abstract The paper reviews the recent trends in the use of stainless steels for practical structural applications. It provides a context for the underpinning engineering research work taking place globally in many universities and research institutes on structural stainless steels, which has enabled the development of economic and comprehensive design standards. An already extensive body of work on the structural use of stainless steel has facilitated the growing use of stainless steels for large structures, usually in corrosive environments where durability, combined with long service life, are important and maintenance closures are very costly. Work has concentrated on duplex grades of stainless steel. Their high strength (30% higher than carbon steel S355) leads to specific applications in weight sensitive structures and this has resulted in a growing range of duplex grades from materials producers. The rationale for use of stainless steel often considers the wider project requirements, including design life and life cycle costing, future maintenance requirements, sustainability and aesthetical demands. The structural use of stainless steel in several case studies of bridges and other large structures from across the world will be discussed. The opportunities for further academic research activities from the perspective of the stainless steel industry will be highlighted.