Hardness

9 mohs

Grain shape

Angular

Melting Point

1950 C min

True density

3.9-4.1g/cm3

Bulk density

1.5-2.1g/cm3(depends on the size)

Al2O3

95%min

TiO2

3%max

Fe2O3

0.5%max

SiO2

1.5%max

CaO

0.5%

NaO

0.%

F-microgrit

F240, F280, F320, F360,F400, F500, F600, F800, F1000

GB-microgrit

W63, W50, W40, W28, W20, W14, W10, W7

JIS-microgrit

JIS240, JIS280, JIS320, JIS360, JIS400, JIS500, JIS600, JIS700, JIS800, JIS1000, JIS1200, JIS1500, JIS2000, JIS2500, JIS3000,

Fepa standard

FEPA-Federation of European Producers of Abrasives

GB standard

Chinese stantard

JIS standard

Japanese Industry Standard

Other grain sizes can be produced if required.

F-microgrits sizes bonded

Grit designation

Mean grain size ds50-value in um

F230

53.0±3

F240

44.5±2

F280

36.5±1.5

F320

29.2±1.5

F360

22.8±1.5

F400

17.3±1

F500

12.8±1

F600

9.3±1

F800

6.5±1

F1000

4.5±0.8