... SIC 90% min, Fe2O3: 2.0% max, F.C. :2.5% max, Moisture 1.0% max. Size : 1-10mm, 90% ... being in the opposite direction, very hard and the level over 9.5 of Moss's. Sic (silicon carbide) resists heat, ... is crystallized as diamond. Harder than α Sic reaching the level 9.5 of Moss's, good measure of tensile strength, best ... 500.200.26--81.150.008GC#1200≤17.59.5±0.8≥5.598.500.200.26--81.130.005GC#1500≤ ...