Basic ramming mass is a dry lining material for unalloyed and alloyed steel castings. Chemical analysis : mgo - 82% cr2o3 - 8% sio2 - 7% fe2o3 - 1.5% tio2 - .0.5% physical properties : grain size - 0 -5 mm humidity - 0.1% max. Bulk density - 2.2 grmcm3 required density - 2.8 grmcm3 sintering temperature - 1250 degree c max. Service temperature - 1700 degree c