China Abrasives Industry Hainan Corporation
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Brown fused alumina, BFA, A, Fused Corundum, Brown corundum abrasive
Product description of Brown aluminum oxide:
Brown aluminum oxide is electrically fused in an arc furnace from a mixture of bauxite at high temperature. It has brown color, high hardness and great toughness. The abrasive tools made of brown aluminum oxide are suitable for grinding carbon steel, normal alloy steel, malleable cast iron and hard bronze. It used for refractory aluminum oxide lining mixture, pouring materials castable, etc.
Grain types and symbol
| Usage | For vitrified wheels | For organic wheels | For belts | For sheets | For abrasives blasting |
| Symbol | A | A-B | A-P1 | A-P2 | A-S |
Typical value of physical chemical performance index
|
Type |
Grit |
Chemical composition (%) |
CAL.TEM. ℃ |
Magnetic % contens≤ |
Range of buld density(g/cm3) |
||||
| AL2O3 | SiO2 | TiO2 | Fe2O3 | CaO | |||||
| A | F46 | 95.72 | 0.92 | 2.52 | 0.06 | 0.28 | 1050-1350 | 0.009 | 1.85 |
| F120 | 95.30 | 1.12 | 2.74 | 0.07 | 0.27 | 1050-1350 | 0.008 | 1.62 | |
| F180 | 94.70 | 1.27 | 2.93 | 0.15 | 0.39 | 1050-1350 | 0.006 | 1.54 | |
| F360 | 92.42 | 1.75 | 3.85 | 0.62 | 0.45 | 1050-1350 | 0.022 | 1.29 | |
| A-B | F46 | 95.56 | 1.12 | 2.39 | 0.06 | 0.30 | - | 0.006 | 1.85 |
| F120 | 95.12 | 1.22 | 2.62 | 0.08 | 0.32 | - | 0.009 | 1.61 | |
| F180 | 94.32 | 1.30 | 2.91 | 0.16 | 0.30 | - | 0.010 | 1.54 | |
| F360 | 91.47 | 1.78 | 4.36 | 0.65 | 0.50 | - | 0.018 | 1.22 | |
| A-P1 | P40 | 95.57 | 1.08 | 2.45 | 0.06 | 0.28 | - | 0.007 | 1.72 |
| P120 | 94.85 | 1.17 | 2.76 | 0.05 | 0.29 | - | 0.009 | 1.58 | |
| P180 | 93.89 | 1.37 | 3.40 | 0.15 | 0.32 | - | 0.006 | 1.52 | |
| P600 | 91.82 | 1.69 | 4.67 | 0.52 | 0.49 | 0.008 | 1.25 | ||
| A-P2 | P40 | 93.27 | 1.32 | 3.20 | 0.19 | 0.30 | - | 0.007 | 1.71 |
| P120 | 92.85 | 1.27 | 3.21 | 0.21 | 0.37 | - | 0.008 | 1.56 | |
| P180 | 91.65 | 1.42 | 3.72 | 0.27 | 0.42 | - | 0.007 | 1.50 | |
| P600 | 90.80 | 1.77 | 4.62 | 0.72 | 0.56 | - | 0.006 | 1.21 | |
Chart for grit size and chemical component of china GB/T 2478-1995
| Type & Grit | Chemical composition (%) | |||
| Al2O3 | TiO2 | CaO | ||
|
A A-P1 |
F4-F80(P80) | 95.00-97.50 | 1.50-3.80 | 0.45 |
|
F90-F150 (P100-P150) |
94.00-97.50 | |||
|
F180-F220 (P180-P220) |
93.00-97.50 | |||
| F220(P220) | ≥92.00 | |||
|
A-B A-P2 |
F4-F80 (P8-P80) |
≥93.00 | 1.50-4.20 | - |
|
F90-F220 (P100-P220) |
≥91.00 | |||
| F220(P220) | ≥90.00 | ≤4.50 | - | |
| A-S | F16-F220 | ≥92.00 | ≤4.20 | - |
Chart for grit size and magnetic contents of china GB/T 2478-1996
|
Grit |
Magnetic contents ≤ |
|||
| A,A-P1 | A-B | A-P2 | A-S | |
| F8,P8 | 0.0520 | 0.0800 | 0.0850 | - |
| F10,P10 | 0.0500 | 0.0780 | 0.0830 | - |
| F12,P12 | 0.0480 | 0.0760 | 0.0810 | - |
| F14,P14 | 0.0460 | 0.0740 | 0.0790 | - |
| F16,P16 | 0.0440 | 0.0720 | 0.0770 | 0.0860 |
| F20, | 0.0420 | 0.0700 | 0.0750 | 0.0830 |
| F22,P20 | 0.0400 | 0.0680 | 0.0730 | - |
| F24,P24 | 0.0380 | 0.0660 | 0.0710 | 0.0800 |
| F30,P30 | 0.0360 | 0.0640 | 0.0690 | 0.0770 |
| F36,P36 | 0.0340 | 0.0620 | 0.0670 | 0.0740 |
| F40, | 0.0320 | 0.0600 | 0.0650 | - |
| F46,P40 | 0.0300 | 0.0580 | 0.0630 | 0.0710 |
| F54,P50 | 0.0280 | 0.0560 | 0.0610 | 0.0680 |
| F60,P60 | 0.0260 | 0.0540 | 0.0590 | 0.0650 |
| F70,P70 | 0.0250 | 0.0520 | 0.0570 | 0.0620 |
| F80,P80 | 0.0240 | 0.0500 | 0.0550 | 0.0590 |
| F90,P100 | 0.0230 | 0.0480 | 0.0530 | 0.0560 |
| F100 | 0.0220 | 0.0460 | 0.0510 | 0.0540 |
| F120,P120 | 0.0210 | 0.0450 | 0.0500 | 0.0530 |
| F150,P150 | 0.0180 | 0.0440 | 0.0490 | 0.0520 |
| F180,P180 | 0.0180 | 0.0440 | 0.049 0 | 0.052 0 |
| F220,P220 | 0.0180 | 0.0440 | 0.049 0 | 0.052 0 |