Brown Fused Alumina is produced by fusion of calcined bauxite in an electric arc furnace at over 2000 centigrade.It stands out due to very high toughness so that it has a long lifespan but cool cutting is not expected.By these characters,it widely use for working on regular steel,carbon steel,forging steel,ingot steel and cast iron,malleable iron as well as some non-ferrous metals.

Chemical composition%(Grit 36)

Particle size distribution

F8–F1200 are available,PSD according to FEPA standard 42,GB/T 2481.

JIS standard or ANSI standard or customer’s specific required is also available.

Bulk Density(g/cm3)

Bulk Density is a typical index to express the shape different.

RUNBAO divide regular brown by different grains shape in two types AF10 and AF20.AF10 has blocky shape with high impact resistance and AF20 has angular shape with sharp cutting edge.So that AF10 has higher toughness and AF20 has higher cutting quality.

Medium shapes(Bulk density between AF10 and AF20)are also available under customer special requirements.

For purpose of improve fracture resistance of grains,regular brown fused alumina can be calcined at 1050 centigrade.At this temperature the grains internal micro-crack could be recovered and internal stress could be released as well as the hydrophily improved,so that the grains toughness increased and then the wheel become more long lasting tool life.

We symbol this treatment as“C1050”.

For purpose of high stress working conditions,regular brown fused alumina can be heat treated at 1350 centigrade(open annealed),thereafter the color change from brown to blue.This treatment could renovate most of crystal imperfection and modify the crystal lattice with foreign oxides.Then the grains are impacted both higher tool life and cutting quality.

We symbol this treatment as“HT”.

For purpose of improve the bonding behavior of grains,regular brown fused alumina could be modified the surface by ceramic coating.Thereafter,the coating will create a ligament between grains and resin.Meantime,the heat treated during process could also modify the crystal to increase the toughness of the grains.

We symbol this treatment as“CC”.

For purpose of further improve the performance of grains,regular brown fused alumina can modified the surface by ceramic coating after heat treated at 1350 centigrade(open annealed).

We symbol this treatment as“HTCC”

RBT are produced by selected the high purity bauxite with accurately fusion control which achieve lowest unstable foreign oxide and free carbon and sulfur contents.The chemical compositions of RBT strictly design for vitrified application,so that RBT is completely reliable product for vitrified abrasives.

Chemical composition%(Grit 46)

Particle size distribution

F8–F1200 are available,PSD according to FEPA standard 42,GB/T 2481.

JIS standard or ANSI standard or customer’s specific required is also available.

Bulk Density(g/cm3)

Blocky shape and sharp shape are also available under customer special requirements.