Brown Fused Alumina Micropowder is brown and features toughness and impact strength. It can bear high pressure.Its knoop hardness is 1800-2200kg/mm2.It`s suitable for making bonded and coated abrasive tools,wet or dry blasting,super precision grinding and polishing,making high quality refractory materials,grinding carbon steel,alloy,malleable cast iron,hard bronze and semi-conductor materials.