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Brown Fused Alumina (BFA)
Items | Unit | Index | Typical | |
Chemical composition | Al2O3 | % | 95%min | 95.5% |
SiO2 | % | 1.50max | 1.33% | |
Fe2O3 | % | 0.50max | 0.18% | |
Ti2O | % | 3.50max | 2.45% | |
CaO | % | 0.30% | 0.11% | |
Melting point | 2050 | |||
Refractoriness | 1980 | |||
True density | g/ cm 3 | 3.90min | ||
Mohs hardness | - | 9.00min | ||
Grain size | mm | 0-50.0-1, 1-3, 3-5.5-8 | ||
Fine powder | mesh | -100, -200, -325 | ||
Abrasive grade | FEPA | F12-F30F150-F220 | ||
Grits NO: | cumuli density | Grits No | cumuli density |
F8 | 1.96-2.06 | F46 | 1.73-1.83 |
F10 | 1.95-2.05 | F54 | 1.73-1.82 |
F12 | 1.93-2.03 | F60 | 1.71-1.81 |
F14 | 1.91-2.01 | F70 | 1.66-1.76 |
F16 | 1.89-1.99 | F80 | 1.64-1.74 |
F20 | 1.89-1.99 | F90 | 1.63-1.72 |
F22 | 1.88-1.98 | F100 | 1.63-1.71 |
F24 | 1.87-1.97 | F120 | 1.60-1.70 |
F30 | 1.83-1.93 | F150 | 1.58-1.68 |
F36 | 1.82-1.92 | F180 | 1.58-1.68 |
F40 | 1.78-1.88 | F220 | 1.58-1.65 |
