Speedfam - silicon carbide is a high quality lapping abrasive available in two types viz. Black & green. It`s hardness is next to boron carbide which permits ultra precision lapping of hard materials. Black silicon carbide is most suitable for lapping of brittle materials having low tensile strength. Green silicon carbide exhibits better hardness and cutting efficiency.
Silicon carbide [sic]: 93% 98%
Free carbon [fc]: 0.1% 0.2%
Ferric oxide [fe2o3]: 0.1% 0.2%
Hardness on mohs scale: 9.2
Specific gravity: 3.2
Colour: black & green
Silicon Carbide - Indian Products Directory