Its hardness is between corundum and diamond, mechanical strength higher than corundum, crisp and sharp. It contains about 98.5% SiC and its toughness is higher than green silicon carbide.
Black Silicon Carbide is smelted in a resistance furnace from quartz sand, petroleum coke and high quality silica which are the main raw materials. Its hardness is between corundum and diamond, mechanical strength higher than corundum, crisp and sharp. Because it contains about 98.5% SiC and its toughness is higher than green silicon carbide, so it is always applied for making some low tensile strength materials like glass, ceramics, stone materials, refractories, cast iron and nonferrous metals, etc.
| Grit | Oversized Grain | Big Grain | Basic Grain | Mangcorn |
Fine Grain
|
||||||||||
| Sieve Size | Oversize | Sieve Size | Oversize≤ | Sieve Size |
Oversize ≥ |
Sieve Size |
Oversize ≥ |
Sieve Size |
Undersize ≤ |
||||||
| mm | μm | Mass Ratio % | mm | μm | Mass Ratio % | mm | μm | Mass Ratio % | mm | μm | Mass Ratio % | mm | μm | Mass Ratio % | |
| F4 | 8.00 | — | 0 | 5.60 | — | 20 | 4.75 | — | 40 | 4.75 4.00 | — | 70 | 3.35 | — | 3 |
| F5 | 6.70 | — | 0 | 4.75 | — | 20 | 4.00 | — | 40 | 4.00 3.35 | — | 70 | 2.80 | — | 3 |
| F6 | 5.60 | — | 0 | 4.00 | — | 20 | 3.35 | — | 40 | 3.35 2.80 | — | 70 | 2.36 | — | 3 |
| F7 | 4.75 | — | 0 | 3.35 | — | 20 | 2.80 | — | 40 | 2.80 2.36 | — | 70 | 2.00 | — | 3 |
| F8 | 4.00 | — | 0 | 2.80 | — | 20 | 2.36 | — | 45 | 2.36 2.00 | — | 70 | 1.70 | — | 3 |
| F10 | 3.35 | — | 0 | 2.36 | — | 20 | 2.00 | — | 45 | 2.00 1.70 | — | 70 | 1.40 | — | 3 |
| F12 | 2.80 | — | 0 | 2.00 | — | 20 | 1.70 | — | 45 | 1.70 1.40 | — | 70 | 1.18 | — | 3 |
| F14 | 2.36 | — | 0 | 1.70 | — | 20 | 1.40 | — | 45 | 1.40 1.18 | — | 70 | 1.00 | — | 3 |
| F16 | 2.00 | — | 0 | 1.40 | — | 20 | 1.18 | — | 45 | 1.18 1.00 | — | 70 | — | 850 | 3 |
| F20 | 1.70 | — | 0 | 1.18 | — | 20 | 1.00 | — | 45 | 1.00 — | 850 — | 70 | — | 710 | 3 |
| F22 | 1.40 | 0 | 1.00 | — | 20 | — | 850 | 45 | — | 850 710 | 70 | — | 600 | 3 | |
| F24 | 1.18 | — | 0 | — | 850 | 25 | — | 710 | 45 | — | 710 600 | 65 | — | 500 | 3 |
| F30 | 1.00 | — | 0 | — | 710 | 25 | — | 600 | 45 | — | 600 500 | 65 | — | 425 | 3 |
| F36 | — | 850 | 0 | — | 600 | 25 | — | 500 | 45 | — | 500 425 | 65 | — | 355 | 3 |
| F40 | — | 710 | 0 | — | 500 | 30 | — | 425 | 40 | — | 425 355 | 65 | — | 300 | 3 |
| F46 | — | 600 | 0 | — | 425 | 30 | — | 355 | 40 | — | 355 300 | 65 | — | 250 | 3 |
| F54 | — | 500 | 0 | — | 355 | 30 | — | 300 | 40 | — | 300 250 | 65 | — | 212 | 3 |
| F60 | — | 425 | 0 | — | 300 | 30 | — | 250 | 40 | — | 250 212 | 65 | — | 180 | 3 |
| F70 | — | 355 | 0 | — | 250 | 25 | — | 212 | 40 | — | 212 180 | 65 | — | 150 | 3 |
| F80 | — | 300 | 0 | — | 212 | 25 | — | 180 | 40 | — | 180 150 | 65 | — | 125 | 3 |
| F90 | — | 250 | 0 | — | 180 | 20 | — | 150 | 40 | — | 150 125 | 65 | — | 106 | 3 |
| F100 | — | 212 | 0 | — | 150 | 20 | — | 125 | 40 | — | 125 106 | 65 | — | 75 | 3 |
| F120 | — | 180 | 0 | — | 125 | 20 | — | 106 | 40 | — | 106 90 | 65 | — | 63 | 3 |
| F150 | — | 150 | 0 | — | 106 | 15 | — | 75 | 40 | — | 75 63 | 65 | — | 45 | 3 |
| F180 | — | 125 | 0 | — | 90 | 15 | — | 75 63 | 40 | — | 75 63 53 | 65 | — | — | — |
| F220 | — | 106 | 0 | — | 75 | 15 | — | 63 53 | 40 | — | 63 53 45 | 60 | — | — | — |
| Mark |
Range of Grit |
Chemical Composition % | ||
| SiC ≥ | F.C ≤ | Fe2O3≤ | ||
| C |
F4～F90 P12～P100 |
98.60 | 0.20 | 0.40 |
|
F100～F150 P120-P150 |
98.10 | 0.25 | 0.50 | |
|
F180～F220 P180～P220 |
97.20 | 0.30 | 0.55 | |
|
F230～F280 P240～P360 |
97.20 | 0.30 | 0.55 | |
|
F320～F500 P400～P1000 |
97.00 | 0.35 | 0.60 | |
|
F600～F800 P1200～P1500 |
96.50 | 0.40 | 0.60 | |
|
F1000～F1200 P2000～P2500 |
95.50 | 0.50 | 0.70 | |
