Dry blast abrasive sand brown fused alumina f36 f46 f54 f60
Brown Aluminum Oxide (ALOX) is suitable for wet or dry surface preparation, cleaning, deburring, and many other applications.
Fused aluminum oxides show a value of 9 on the Mohs scale of hardness close to diamond (Mohs 10), the hardest known substance. Besides their superior hardness, the characteristics of fused aluminum oxides include sharp-edged grains, great load bearing capacity, a high degree of shock resistance and thermal and chemical stability.
| Chemical & Physical Properties | ||||||
| Crystal Form | Alpha alumina trigonal system | |||||
| Chemical nature | Amphoteric | |||||
| Reaction with acids | Subject to mild attack by aqua and hydrofluoric acid | |||||
| Reaction with Alkalies | Very slight with strong hot solution only | |||||
| Oxidation-reduction effects | None | |||||
| True Density(g/cm3) | 3.97 | |||||
| Hardness | Knoop(kg/cm2) | 2000-2200 | ||||
| Moh’s | 9 | |||||
| Colour | Dark Brown | |||||
| Colour after firing | Light blue | |||||
| Melting point | 2000°C | |||||
| Max Usable temperature | 1900°C | |||||
| Specific heat (cal/g.°C) | 0.26(20-29°C) | |||||
| Coefficient of thermal conductivity | Room temperature | 900°C | ||||
| (cal/cm2.sec.°C) | 0.047 | 0.013 | ||||
| Electrical resistivity (Wcm) | 30°C | 300°C | 900°C | 1600°C | ||
| 1016 | 1013 | 105 | 104 | |||
| Coefficient of linear expansion (x10-6) | 7-9(0-1600°C) | |||||
| Grit No. | Micron | Grit No. | Micron | Grit No. | Micron |
| 10 | 2360 ~ 2000 | 30 | 710 ~ 600 | 80 | 212 ~ 180 |
| 12 | 2000 ~ 1700 | 36 | 600 ~ 500 | 90 | 180 ~ 150 |
| 14 | 1700 ~ 1400 | 40 | 500 ~ 425 | 100 | 150 ~ 125 |
| 16 | 1400 ~ 1180 | 46 | 425 ~ 355 | 120 | 125 ~ 106 |
| 20 | 1180 ~ 1000 | 54 | 355 ~ 300 | 150 | 106 ~ 75 |
| 22 | 1000 ~ 850 | 60 | 300 ~ 250 | 180 | 90 ~ 63 |
| 24 | 850 ~ 710 | 70 | 250 ~ 212 | 220 | 75 ~ 53 |
| Available micron powder sizes | ||||||||
| China GB 2477-83 | JIS | FEPA(84) / DIN(70) | ISO(77) | |||||
| Grit No. | Standard size range(µm) | Grit No. | ds50 value (µm) | Grit No. | ds50 value (µm) | Grit No. | ds50 value (µm) | |
| Standard werte der Mikro-F-Reihe | Serigraph 5000D | |||||||
| 240 | 60.0±4.0 | P240 | 58.5±2.0 | |||||
| 280 | 52.0±3.0 | P280 | 52.2±2.0 | |||||
| W63 | 63 – 50 | 320 | 46.0±2.5 | F230/53 | 53±3.0 | 50.0±3.0 | P320 | 46.2±1.5 |
| W50 | 50 – 40 | 360 | 40.0±2.0 | F240/45 | 44.5±2.0 | 42.0±2.0 | P360 | 40.5±1.5 |
| 400 | 34.0±2.0 | P400 | 35.0±1.5 | |||||
| W40 | 40 – 28 | 500 | 28.0±2.0 | F280/37 | 36.5±1.5 | 34.5±1.5 | P500 | 30.2±1.5 |
| 600 | 24.0±1.5 | F320/29 | 29.2±1.5 | 27.7±1.5 | P600 | 25.8±1.0 | ||
| W28 | 38 – 20 | 700 | 21.0±1.3 | F360/23 | 22.8±1.5 | 21.6±1.5 | P800 | 21.8±1.0 |
| 800 | 18.0±1.0 | F400/17 | 17.3±1.0 | 16.5±1.0 | P1000 | 18.3±1.0 | ||
| W20 | 20 – 14 | 1000 | 15.5±1.0 | F500/13 | 12.8±1.0 | 12.3±1.0 | P1200 | 15.3±1.0 |
| W14 | 14-10 | 1200 | 13.0±1.0 | |||||
| 1500 | 10.5±1.0 | F600/9 | 9.3±1.0 | 9.0±1.0 | ||||
| W10 | 10-7 | 2000 | 8.5±0.7 | |||||
| W7 | 7-5 | 2500 | 7.0±0.7 | F800/7 | 6.5±1.0 | 6.3±1.0 | ||
| W5 | 5 – 3.5 | 3000 | 5.7±0.5 | F1000/5 | 4.5±0.8 | 4.5±0.8 | ||
| F1200/3 | 3.1±0.5 | 3.1±0.5 | ||||||
| for general purposes | for general purposes | for bonded abrasives | for coated abrasives | |||||
