Low Cement Castable 40 % Alumina 50 % Alumina 60 % Alumina 70 % Alumina 80 % Alumina 90 % Alumina   Conventional Castables 40 % Alumina 50 % Alumina 60 % Alumina 70 % Alumina 90 % Alumina   Silicon Carbide Castables 15% SIC 30% SIC 50% SIC   Gunning Castables 15 % Alumina 30 % Alumina 40 % Alumina 50 % Alumina 60 % Alumina 70 % Alumina 80 % Alumina