Item Density Cold Crushing Thermal A12O3 Fe2O
G/cm3 S trength Expansion min max

GM-23 0.55 1.6 0.5 40 0.7
GM-26 0.78 2.8 0.7 55 0.7
GM-28 0.85 3.2 0.8 66 0.6
GM-30 1.02 3.5 0.9 72.5 0.5