this study was carried out in conjunction with the investigation, reported in part i, on the microstructural characteristics of an alumina-spinel castable with several percentages of mgo content. bulk density and cold crushing strength of samples were evaluated dried and at three fired states (1000, 1200, 1400 °c). results indicate little influence of mgo additions on physico-chemical properties of the alumina-magnesia/self-forming spinel castable. characteristics compared with those reported for conventional alumina-spinel castables did not show large difference in values. therefore, the alumina-magnesia/self-forming spinel castable could be a possible material for substitution of the conventional alumina-spinel castable.