Entwicklungstendenzen metallischer Werkstoffe aus der Sicht der Verwendung im Chemieanlagenbau

Abstract Developments of metallic materials in view of their use for chemical plants . The demands placed on materials of construction for chemical plants are becoming more and more stringent due to the steady increase in mechanical, thermal, and chemical loading. Molten metallurgical improvements, alloying steps, new methods of plastic deformation and heat treatment, and facilitation of workability are implemented in attempts to optimize the properties of construction materials and to achieve better adaptation to the service conditions. Progress achieved by research and developments during recent years in the above mentioned field is apparent in practical applications of some groups of materials which are important for construction of apparatus; these are high‐strength fine grained steels, high‐alloyed ferritic and austenitic stainless steels, as well as duplex steels. Moreover, the improvements – especially in corrosion restistance – are considered which can be obtained by special melting techniques and new fabrication processes. In addition, the advantages of electroslag remelting (ESR) and powdermetallurgical fabrication of semi‐finished products of corrosion resistant alloys and the possibilities of hotisostaticpressing (HIP) of structural components are discussed.