SEDL / STP / STP706-EB / STP38216S

Impact Properties of Fe-13Cr Thick Plate

Mintz, B
Section manager and departmental manager, British Steel Corp., Scottish Laboratory, Motherwell,

Arrowsmith, JM
Section manager and departmental manager, British Steel Corp., Scottish Laboratory, Motherwell,

Pages: 23    Published: Jan 1980

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Abstract

The impact properties of an Fe-13Cr ferritic stainless steel at gages of 250 and 125 mm have been examined. Because these steels have notoriously coarse grain sizes, it is found that, on hot-rolling to thick plate, poor impact properties are often developed. Because only partial transformation to austenite is achieved on heat-treatment, it is not possible to refine the ferritic grain size and so improve impact performance. It has been found, however, that simple heat treatments can refine the grain boundary carbides and this action gives rise to as much as a 60 deg C fall in transition temperature. The various heat treatments given to the plates after hot-rolling are discussed and their impact properties compared with those obtained in the hot-rolled condition.