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Dragon Abrasives Group Limited

Add: 265# Anshanxi Street, Core Mall Times International Department, Nankai District, Tianjin, 300192 China

Fax: +86-22-87899537

Mob: +8613622002228

Tel: +86-22-87899539

E-mail: info@abrasives.asia

Web: http://www.abrasivesasia.com

Fused Alumina

Brown Aluminum Oxide FEPA Standard for Bonded and Coated Abrasive

Brown Aluminum Oxide FEPA Standard for Bonded and Coated Abrasive

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, ...


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-ReiheSedigraph 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 purposesfor bonded abrasivesfor coated abrasives




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