Black Silicon carbide Grain is an extremely hard and 99% SiC carborundum grit. As an abrasive material, it can work well for abrasive blasting, surface treatment, grinding on hard material such as marble, glass, jade, etc. Silicon Carbide is produced by a process involving the electrochemical reaction of silica(SiO2)-in the form of quartz mixed with Carbon(C) in the form of raw petroleum coke.
| Physical properties | |
| Crystal Form： | Hexagonal (Alpha SiC） |
| Color： | Black |
| Melting point: | Dissociates at Approx. 2500°C |
| True Density： | 3.21 g/cm3 |
| Hardness： | Mohs: 9.2 |
| Bulk density: | 1.2-1.6 g/cm3 |
| Typical chemical analysis | |
| Silicon Carbide (SiC) | 98.30% |
| Free Carbon (C) | 0.25% |
| Silicon Dioxide (SiO2 ) | 0.60% |
| Free Silicon (Si) | 0.70% |
| Iron (Fe2 O3 ) | 0.08% |
| Available grit sizes | |
| (Average grain size) | |
| FEPA | Particle size range |
| in µm | |
| F 012: | 1400–2000µm |
| F 014: | 1180–1700µm |
| F 016: | 1000–1400µm |
| F 020: | 850–1180µm |
| F 022: | 710–1000µm |
| F 024: | 600–850µm |
| F 030: | 500–710µm |
| F 036: | 425–600µm |
| F 040: | 355–500µm |
| F 046: | 300–425µm |
| F 054: | 250–355µm |
| F 060: | 212–300µm |
| F 070: | 180–250µm |
| F 080: | 150–212µm |
| F 090: | 125–180µm |
| F 100: | 106–150µm |
| F 120: | 90–125µm |
| F 150: | 63–106µm |
| F 180: | 63–90µm |
| F 220: | 53–75µm |
