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Characteristics of centrifugally cast GX25CrNiSi18-9 steel

By R. Zapała, B. Kalandyk and A. Rakowska


The paper presents the results of microstructural examinations of the industrial heat-resistant centrifugally cast GX25CrNiSi18-9 steel characterised by increased content of Cu. The study included changes in the microstructure of base cast steel respective of the steel held at a temperature of 900 and 950°C for 48 hours. Based on the results obtained, an increase in microhardness of the examined cast steel matrix with increasing temperature was stated, which was probably caused by fine precipitates enriched in Cr, Mo, and C forming inside the matrix grains.The layer of scale formed on the tested cast steel oxidised in the atmosphere of air at 900 and 950°C was characterised by an increased tendency to degradation with increasing temperature of the conducted tests

Topics: Metallography, Heat resistance 18Cr-9Ni cast steel, Microstructure, Materials of engineering and construction. Mechanics of materials, TA401-492
Publisher: Sciendo
Year: 2011
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