D50 value of black carborundum powder under FEPA,JIS,P and W standard
Black carborundum,is also called black silicon carbide or Black SiC,is produced in electrical internal resistance furnaces from high purity silica sands and
petroleum coke,its combination of being very hard and sharp makes it a very aggressive abrasive.
Zhengzhou haixu abrasives co.,ltd,founded in 1999,has been manufacturing and exporting abrasives for more than 20years.which including black carborundum,green carborundum,white corundum and brown corundum.
We produce black carborundum powder under FEPA,JIS,P and W standard separately ,and the D50 value is as follows:
| Size | D50(UM) | Size | D50(UM) | Size | D50(UM) | Size | D50(UM) |
| JIS#240 | 57.0±3.0 | P240 | 58.5±2.0 | F230 | 53.0±3.0 | W63 | 63-50 |
| JIS#280 | 48.0±3.0 | P280 | 52.2±2.0 | F240 | 44.5±2.0 | W50 | 50-40 |
| JIS#320 | 40.0±2.5 | P320 | 46.2±1.5 | F280 | 36.5±1.5 | W40 | 40-28 |
| JIS#360 | 35.0±2.0 | P360 | 40.5±1.5 | F320 | 29.2±1.5 | W28 | 28-20 |
| JIS#400 | 30.0±2.0 | P400 | 35.0±1.5 | F360 | 22.8±1.5 | W20 | 20-14 |
| JIS#500 | 25.0±2.0 | P500 | 50.2±1.5 | F400 | 17.3±1.0 | W14 | 14-10 |
| JIS#600 | 20.0±1.5 | P600 | 25.8±1.0 | F500 | 12.8±1.0 | W10 | 10-7 |
| JIS#700 | 17.0±1.5 | P800 | 21.8±1.0 | F600 | 9.3±1.0 | W7 | 7-5 |
| JIS#800 | 14.0±1.0 | P1000 | 18.3±1.0 | F800 | 6.5±1.0 | W5 | 5-3.5 |
| JIS#1000 | 11.5±1.0 | P1200 | 15.3±1.0 | F1000 | 4.5±0.8 | ||
| JIS#1200 | 9.5±0.8 | P1500 | 12.6±1.0 | F1200 | 3.0±0.5 | ||
| JIS#1500 | 8.0±0.6 | P2000 | 10.3±0.8 | ||||
| JIS#2000 | 6.7±0.6 | P2500 | 8.4±0.5 | ||||
| JIS#2500 | 5.5±0.5 | P3000 | 6.7±0.5 | ||||
| JIS#3000 | 4.0±0.5 | P4000 | 5.5±0.5 | ||||
| JIS#4000 | 3.0±0.4 | P5000 | 4.0±0.5 |