Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Stainless steels for applications in civil engineering
In Germany in the past for load-bearing structural parts and fasteners made of stainless steel only the standard austenitic steels of the type 1.4301 or 1.4401, respectively, had an official approval from the building regulation authority. For severe atmospherical corrosion conditions, like for example in indoor swimming pool, the application of stainless steels were prohibited for such components. Severe failures of suspension rods made of stainless steel in such environments were background for this decision. Within the last years significant progress in materials development has taken place. Furthermore new reults from laboratory tests as well as long-term experiences from different practical applications under various environmental and loading conditions now exist. The state of knowledge has been considered in a new form of the approval. In cooperation between steel producers and potential end users 15 different stainless steels were selceted for the new approval. The steel types range from feritic alloys with about 12 % Chromium up to high-alloyed materials with 25 % chromium and 6 % molybdenum. As the steels have different cold deformation ratios in laboratory tests the effect of deformation state on stress corrosion cracking was investigated by means of U-bent and tensile specimens. This paper gives a surney of the results of these tests and describes the different stainless stell grades of the new approval and their application range.
Stainless steels for applications in civil engineering
In Germany in the past for load-bearing structural parts and fasteners made of stainless steel only the standard austenitic steels of the type 1.4301 or 1.4401, respectively, had an official approval from the building regulation authority. For severe atmospherical corrosion conditions, like for example in indoor swimming pool, the application of stainless steels were prohibited for such components. Severe failures of suspension rods made of stainless steel in such environments were background for this decision. Within the last years significant progress in materials development has taken place. Furthermore new reults from laboratory tests as well as long-term experiences from different practical applications under various environmental and loading conditions now exist. The state of knowledge has been considered in a new form of the approval. In cooperation between steel producers and potential end users 15 different stainless steels were selceted for the new approval. The steel types range from feritic alloys with about 12 % Chromium up to high-alloyed materials with 25 % chromium and 6 % molybdenum. As the steels have different cold deformation ratios in laboratory tests the effect of deformation state on stress corrosion cracking was investigated by means of U-bent and tensile specimens. This paper gives a surney of the results of these tests and describes the different stainless stell grades of the new approval and their application range.
Stainless steels for applications in civil engineering
Korrosionsbeständige Stähle für die Anwendung im Bauwesen
Mietz, J. (Autor:in) / Isecke, B. (Autor:in)
SSW, Stainless Steel World, 2 ; 334-339
2001
6 Seiten, 7 Bilder, 3 Tabellen, 27 Quellen
Aufsatz (Konferenz)
Englisch
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