Insulating fire Brick

ItemsTesting Temperature (ºC) When reheated with 2% contracting rateVolume Density g/cm3Pressure Strength kgf/ cm2Thermal Conductivity kcal/mhºC (350ºC)AA-1900≤0.50≥5≤0.13A-21000≤0.50≥5≤0.14A-31100≤0.50≥5≤0.15A-41200≤0.55≥8≤0.16A-51300≤0.60≥8≤0.17A-61400≤0.70≥10≤0.20A-71500≤0.75≥10≤0.22BB-1900≤0.70≥25≤0.17B-21000≤0.70≥25≤0.18B-31100≤0.75≥25≤0.20B-41200≤0.80≥25≤0.22B-51300≤0.80≥25≤0.23B-61400≤0.90≥30≤0.27B-71500≤1.00≥30≤0.31CC-11300≤1.10≥50≤0.30C-21400≤1.20≥70≤0.38C-31500≤1.25≥100≤0.45 Top grade insulating fire brick are made from high-purity refractory clays, with graduated additions of alumina for the higher temperature products, and a carefully graded organic filler, which burns out during manufacture to give a controlled, uniform lacuna structure. Each brick machined to precise size on all six faces. The maximum continue use temperature depends on application.