DALMIA OCL HIGH ALUMINA BRICK HA 70.30 TECHNICAL DATA PRODUCT: HA 70 30 Type : 70 % Alumina Brick Method of Manufacture:Machine Pressed Nature of BondMaximum Service Temperature::Ceramic1450oC CHEMICAL COMPOSITION SPECIFICATIONTYPICAL VALUESAl2O3%Min. 70.071.20Fe2O3%Max. 3.02.53 PHYSICAL PROPERTIES Apparent Porosity%Max. 2319.5Bulk Densityg/ccMin. 2.602.65Cold Crushing Strengthkg/cm2Min. 500585 THERMAL PROPERTIES P.C.E (Refractoriness)orton / OCMin.36 (1804)+36 / (1804)R.U.L. taOCMin 14501460P.L.C at 1500OC /2 hrs.%Max. +2.5+ 1.72Thermal Expansion at 1000OC%–0.59Thermal Conductivityw/mK– At 1000OC Hot Face Temperature –1.94