The difference between Black silicon carbide F-Grit and P-Grit
There are differences between Black silicon carbide F-Grit and P-Grit in many aspects. Black silicon carbide P-Grit abrasive powder is specifically used in coated abrasives. For example, black silicon carbide water sanding paper, sanding sheets, sponge polishing blocks, nylon polishing wheels, non-woven grinding wheels, black diamond polishing wheels, grid grinding wheels, and other polishing products, these products use black silicon carbide P-Grit grain. Black silicon carbide F-Grit is used for bonded abrasive tools such as resin grinding wheels, diamond grinding wheels, oxalic acid Frankfurt grinding blocks, etc.
The main differences between black silicon carbide P-Grit and F-Grit are reflected in the shape, particle size distribution, and uses.
1. Differences in particle shape.
2. Differences in particle size range.
>> Black silicon carbide P-Grit Sieve distribution:
| Black SiC P-Grit Macro size | Sieve Test 1 | Sieve Test 2 | Sieve Test 3 | Sieve Tests 3 and 4 | Sieve Tests 3,4, and 5 | Fine | ||||
| 100% passing mesh | Residue passing mesh | MAX % | Residue passing mesh | MIN % | Residue passing mesh | MIN % | Passing mesh | Min % | MAX % | |
| P16 | 8 | 12 | 3 | 14 | 20-32 | 14 16 | 66-84 | 14 16 18 | 96 | 4 |
| P20 | 12 | 16 | 7 | 18 | 34-50 | 18 20 | 80-92 | 18 20 25 | 96 | 4 |
| P24 | 14 | 18 | 1 | 20 | 10-18 | 20 25 | 53-70 | 20 25 30 | 92 | 8 |
| P30 | 16 | 20 | 1 | 25 | 10-18 | 25 30 | 53-70 | 25 30 35 | 92 | 8 |
| P36 | 18 | 25 | 1 | 30 | 10-18 | 30 35 | 53-70 | 30 35 40 | 92 | 8 |
| P40 | 25 | 35 | 7 | 40 | 34-50 | 40 45 | 80-92 | 40 45 50 | 96 | 4 |
| P50 | 30 | 40 | 3 | 45 | 20-32 | 45 50 | 66-84 | 45 50 60 | 96 | 4 |
| P60 | 35 | 45 | 1 | 50 | 10-18 | 50 60 | 53-70 | 50 60 70 | 92 | 8 |
| P80 | 45 | 60 | 3 | 70 | 20-32 | 70 80 | 66-84 | 70 80 100 | 96 | 4 |
| P100 | 50 | 70 | 1 | 80 | 10-18 | 80 100 | 53-70 | 80 100 120 | 92 | 8 |
| P120 | 70 | 100 | 7 | 120 | 34-50 | 120 140 | 80-92 | 120 140 170 | 96 | 4 |
| P150 | 80 | 120 | 3 | 140 | 20-32 | 140 170 | 66-84 | 140 170 200 | 96 | 4 |
| P180 | 100 | 140 | 2 | 170 | 10-20 | 170 200 | 50-84 | 170 200 230 | 90 | 10 |
| P220 | 120 | 170 | 2 | 200 | 10-20 | 200 230 | 50-84 | 200 230 270 | 90 | 10 |
| Black SiC P-Grit Micro size | D0（um） | D3(um) | D50(um) | D95(um) |
| P240 | Max. 110 | Max. 81.7 | 58.5±2.0 | Min. 44.5 |
| P280 | Max. 101 | Max. 74.0 | 52.2±2.0 | Min. 39.2 |
| P320 | Max. 94 | Max. 66.8 | 46.2±1.5 | Min. 34.2 |
| P360 | Max. 87 | Max. 60.3 | 40.5±1.5 | Min. 29.6 |
| P400 | Max. 81 | Max. 53.9 | 35.0±1.5 | Min. 25.2 |
| P500 | Max. 77 | Max. 48.3 | 30.2±1.5 | Min. 21.5 |
| P600 | Max. 72 | Max. 43.0 | 25.8±1.0 | Min. 18.0 |
| P800 | Max. 67 | Max. 38.1 | 21.8±1.0 | Min. 15.1 |
| P1000 | Max. 63 | Max. 33.7 | 18.3±1.0 | Min. 12.4 |
| P1200 | Max. 58 | Max. 29.7 | 15.3±1.0 | Min. 10.2 |
| P1500 | Max. 53 | Max. 22.4 | 12.6±1.0 | Min. 8.3 |
| P2000 | Max. 45 | Max. 19.3 | 10.3±0.8 | Min. 6.7 |
| P2500 | Max. 38 | Max. 14.0 | 8.4±0.5 | Min. 5.4 |
| P3000 | Max. 32 | Max. 12.0 | 6.7±0.5 | Min. 3.0 |
| P4000 | Max. 27 | Max. 11.0 | 5.5±0.5 | Min. 2.0 |
| P5000 | Max. 23 | Max. 8.0 | 4±0.5 | Min. 1.8 |
>> Black silicon carbide F-Grit Sieve distribution:
| Black SiC F-Grit Macro size | Sieve Test 1 | Sieve Test 2 | Sieve Test 3 | Sieve Tests 3 and 4 | Sieve Test 5 | |||
| 100% passing mesh | Residue passing mesh | MAX % | Residue passing mesh | MIN % | Residue passing mesh | MIN % | Max passing 3% mesh | |
| F12 | 7 | 10 | 20 | 12 | 45 | 12 14 | 70 | 16 |
| F14 | 8 | 12 | 20 | 14 | 45 | 14 16 | 70 | 18 |
| F16 | 10 | 14 | 20 | 16 | 45 | 16 18 | 70 | 20 |
| F20 | 12 | 16 | 20 | 18 | 45 | 18 20 | 70 | 25 |
| F22 | 14 | 18 | 20 | 20 | 45 | 20 25 | 65 | 30 |
| F24 | 16 | 20 | 25 | 25 | 45 | 25 30 | 65 | 35 |
| F30 | 18 | 25 | 25 | 30 | 45 | 30 35 | 65 | 40 |
| F36 | 20 | 30 | 25 | 35 | 45 | 35 40 | 65 | 45 |
| F40 | 25 | 35 | 30 | 40 | 40 | 40 45 | 65 | 50 |
| F46 | 30 | 40 | 30 | 45 | 40 | 45 50 | 65 | 60 |
| F54 | 35 | 45 | 30 | 50 | 40 | 50 60 | 65 | 70 |
| F60 | 40 | 50 | 30 | 60 | 40 | 60 70 | 65 | 80 |
| F70 | 45 | 60 | 25 | 70 | 40 | 70 80 | 65 | 100 |
| F80 | 50 | 70 | 25 | 80 | 40 | 80 100 | 65 | 120 |
| F90 | 60 | 80 | 20 | 100 | 40 | 100 120 | 65 | 140 |
| F100 | 70 | 100 | 20 | 120 | 40 | 120 140 | 65 | 200 |
| F120 | 80 | 120 | 20 | 140 | 40 | 140 170 | 65 | 230 |
| F150 | 100 | 140 | 15 | 170 200 | 40 | 170 200 230 | 65 | 325 |
| F180 | 120 | 170 | 15 | 200 230 | 40 | 200 230 270 | 65 | |
| F220 | 140 | 200 | 15 | 230 270 | 40 | 230 270 325 | 60 | |
| Black SiC F-Grit Micro size | D3(um) | D50(um) | D94（um) |
| F230 | ＜82 | 53.0±3.0 | >34 |
| F240 | ＜70 | 44.5±2.0 | >28 |
| F280 | ＜59 | 36.5±1.5 | >22 |
| F320 | ＜49 | 29.2±1.5 | >16.5 |
| F360 | ＜40 | 22.8±1.5 | >12 |
| F400 | ＜32 | 17.3±1.0 | >8 |
| F500 | ＜25 | 12.8±1.0 | >5 |
| F600 | ＜19 | 9.3±1.0 | >3 |
| F800 | ＜14 | 6.5±1.0 | >2 |
| F1000 | ＜10 | 4.5±0.8 | >1 |
| F1200 | ＜7 | 3.0±0.5 | >1(at 80%) |
| F1500 | ＜5 | 2.0±0.4 | >0.8(at 80%) |
| F2000 | ＜3.5 | 1.2±0.3 | >0.5(at 80%) |
3. Different uses.
The black silicon carbide P mark is mainly used for coating abrasive tools.
Black silicon carbide F sand can be used not only for consolidating abrasive tools but also as sandblasting media, wear-resistant materials, reaction-sintered ceramic materials, etc.
