Brown Aluminum Oxide FEPA Standard for Bonded and Coated Abrasive

Product Detail

Brown aluminum oxide (BFA) is made from high quality bauxite by fusing in an electric arc furnace at high temperature. It has good toughness and high hardness. It is suitable for producing vitrified and resin bonded tools, and for lapping, polishing, and sand blasting and surface preparation


BFA can be also used to make superior refractory products.




Instruction:

Typical Chemical Analysis:

Al2O3	95.72%
TiO2	2.25%
SiO2	0.88%
Fe2O3	0.09%




Physical Properties:

Color	Brown
Shape	Blocky
Crystal Form	Alpha alumina trigonal system
Specific Gravity	3.92
Hardness	2090 Knoop scale, 9.0 Mohs scale
Magnetic Material	0.0076%




Split Sizes Available :

F12-F240, P12-P240

20-0mm, 20-10mm, 8-5mm, 5-3mm, 3-1mm, 1-0mm,

8/16mesh, 16/30mesh, 30/60mesh,

0-100mesh, 0-200mesh, 0-325mesh,

Other size available upon request.




Magnetic Matters Contents (% by weight)
Grit No.	Magnetic Matters Content
16#-30	<0.0380
36#-60#	<0.0280
70-120#	<0.0230
150#-220#	<0.0170







Available grain sizes
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 mircron powder sizes
China GB 2477-83		JIS		FEPA(84) / DIN(70)			ISO(77)
Grit No.	Norminal size range(µm)	Grit No.	ds50 value (µm)	Grit No.	ds50 value (µm)		Grit No.	ds50 value (µm)
					Standard werte der Mikro-F-Reihe	Sedigraph 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