BROWN ALUMINUM OXIDE

BAO is a tough, medium density, virgin, fused brown aluminum oxide abrasive.

BAO is designed for pressure blasting of materials of almost every type, including glass, granite, marble and ceramic. It is also used for the preparation of surfaces prior to painting or bonding; as well as for light deburring, scale removal and a generation of matte finishes. BAO is closely sized, enabling operators to consistently duplicate finishes.

This product is produced to conform to C.I.D. -A-A-59316, General Electric Aircraft Engine Group D50TF5, and most Pratt and Whitney Aircraft PMC Specifications.

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Brown Aluminum Oxide
AL₂O₃	96.12%
TiO₂	2.70%
SiO₂	.67%
Fe₂O₃	.11%
Other Oxides	.40%

HARDNESS COMPARISONS

Blasting Media	MOHS Value*	Knoop Value**
Diamond	10.0	7000
Brown Aluminum Oxide	9.0	2100
Garnet	7.0	1360
Quartz	7.0	820
Sand	6.0	560

* The MOHS Hardness Scale measures the hardness of aluminum oxide in relation to other blasting media – on a scale of 1-10.
** The Knoop scale measures hardness on a scale of 0 – 7,000

GRIT SIZE CONVERSION

Grit Size	Inches (average)	Microns (average)
16	0.043	1092
20	0.037	940
24	0.027	686
30	0.022	559
36	0.019	483
46	0.014	356
54	0.012	305
60	0.010	254
70	0.008	203
80	0.0065	165
90	0.0057	145
100	0.0048	122
120	0.0040	102
150	0.0035	89
180	0.0030	76
220	0.0025	63

Note: * The conversions listed are for various grits sized according to the Bureau of Standards specifications, under Simplified Practice Recommendation 118-50

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16	All pass No. 8 Screen 6% retained on No. 14 Screen 88% retained on No. 18 Screen Max 5% thru a No. 25 Screen	80		All pass No. 45 Screen 21% retained on No. 70 Screen 74% retained on No. 100 Screen Max 5% thru a No. 140 Screen
20	All pass No. 10 Screen 12% retained on No. 16 Screen 79% retained on No. 20 Screen Max 5% thru a No. 30 Screen	90		All pass No. 50 Screen 10% retained on No. 80 Screen 84% retained on No. 120 Screen Max 5% thru a No. 170 Screen
24	All pass No. 14 Screen 19% retained on No. 18 Screen 76% retained on No. 25 Screen Max 5% thru a No. 40 Screen	100		All pass No. 60 Screen 4% retained on No. 100 Screen 85% retained on No. 140 Screen Max 5% thru a No. 230 Screen
30	All pass No. 16 Screen 10% retained on No. 20 Screen 90% retained on No. 35 Screen Max 5% thru a No. 45 Screen	120		All pass No. 70 Screen 15% retained on No. 120 Screen 75% retained on No. 170 Screen Max 5% thru a No. 270 Screen
36	All pass No. 18 Screen 8% retained on No. 25 Screen 94% retained on No. 40 Screen Max 5% thru a No. 50 Screen	150		All pass No. 80 Screen 10% retained on No. 140 Screen 76% retained on No. 230 Screen Max 5% thru a No. 325 Screen
46	All pass No. 25 Screen 19% retained on No. 40 Screen 80% retained on No. 50 Screen Max 5% thru a No. 70 Screen	180		All pass No. 80 Screen 7% retained on No. 170 Screen 39% retained on No. 230 Screen 24% thru a No. 270 Screen
54	All pass No. 30 Screen 8% retained on No. 45 Screen 86% retained on No. 60 Screen Max 5% thru a No. 80 Screen	220		All pass No. 100 Screen 7% retained on No. 200 Screen 48% retained on No. 270 Screen 25% thru a No. 325 Screen
60	All pass No. 35 Screen 20% retained on No. 50 Screen 78% retained on No. 70 Screen Max 5% thru a No. 100 Screen	240		All pass No. 120 Screen 4% retained on No. 200 Screen 21% retained on No. 270 Screen 50% thru a No. 325 Screen
70	All pass No. 40 Screen 10% retained on No. 60 Screen 74% retained on No. 80 Screen Max 5% thru a No. 120 Screen		* For allowable grading limits, refer to ANSI B74.12-2001 Table 3

BROWN ALUMINUM OXIDE

BROWN ALUMINUM OXIDE

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