D50 value of FEPA,JIS,W,M standard of white corundum micropowder
White corundum,also called white fused alumina WFA,white fused aluminum oxide,white aluminum oxide etc,is made from the high quality alumina by melting above 2000 in the electric arc furnace and cooling. It is white with the main crystal phase α-Al2O3.
Zhengzhou haixu abrasives co.,ltd,founded in 1999,have been producing and exporting abrasives for more than 20 years.including white corundum,brown corundum and silicon carbide.
For them,we both produce macrogrit and micropowder.
About PSD,for macrogrit,no matter produce under which standard,the PSD is almost the same,but micropowder has big difference.
Today,just take white corundum for example to show the D50 value of FEPA,JIS,W,M standard of white corundum micropowder as follows:
| Size | D50(UM) | Size | D50(UM) | Size | D50(UM) | Size | D50(UM) |
| 240 | 57.0±3.0 | F230 | 53.0±3.0 | W63 | 63-50 | ||
| 280 | 48.0±3.0 | F240 | 44.5±2.0 | W50 | 50-40 | 4# | 50-40 |
| 320 | 40.0±2.5 | F280 | 36.5±1.5 | W40 | 40-28 | 3# | 40-28 |
| 360 | 35.0±2.0 | F320 | 29.2±1.5 | W28 | 28-20 | M28 | 28-20 |
| 400 | 30.0±2.0 | F360 | 22.8±1.5 | W20 | 20-14 | M20 | 20-14 |
| 500 | 25.0±2.0 | F400 | 17.3±1.0 | W14 | 14-10 | M14 | 14-10 |
| 600 | 20.0±1.5 | F500 | 12.8±1.0 | W10 | 10-7 | M10 | 10-7 |
| 700 | 17.0±1.5 | F600 | 9.3±1.0 | W7 | 7-5 | M7 | 7-5 |
| 800 | 14.0±1.0 | F800 | 6.5±1.0 | W5 | 5-3.5 | M5 | 5-3.5 |
| 1000 | 11.5±1.0 | F1000 | 4.5±0.8 | W3.5 | 3.5-2.5 | ||
| 1200 | 9.5±0.8 | F1200 | 3.0±0.5 | W2.5 | 2.5-1.5 | ||
| 1500 | 8.0±0.6 | F1500 | 2.0±0.4 | W1.5 | 1.5-0.5 | ||
| 2000 | 6.7±0.6 | F2000 | 1.2±0.3 | W0.5 | 1.0-0 | ||
| 2500 | 5.5±0.5 | ||||||
| 3000 | 4.0±0.5 | ||||||
| 4000 | 3.0±0.4 | ||||||
| 6000 | 2.0±0.4 | ||||||
| 8000 | 1.2±0.3 | ||||||
| 10000 | 0.8±0.1 |