Black Carborundum is produced at high temperature in an electric resistance type furnace with quarts sand and petroleum coke as its main raw marterials .Its hardness is between fused alumina and synthetic diamond.Mechanical intensity of it is higher than fused alumina .It is brittle and sharp has electrical and heat conductivity in some degree.The abrasives made of it are suitable for working on cast iron,non-ferrous metal,rock, leather,rubber,etc.It is also broadly used as refractory material and metallurgical additive.

Abrasives grade

Grit size: 16#,20#,24#30#,36#,46#,54#,60#,80#,100#,120#,150#,180#,220#

Micropowder:240#,280#,320#,360#,400#,500#,600#,800#,1000#,1200#,1500#

            2000#,2500#,3000#,4000#

Refractory  grade:1-0mm,3-1mm,5-3mm,5-8mm -200mesh,-240mesh,-320mesh

The physical and chemical analysis

SIC   MIN  98%

F.C.   MAX  0.35%

Fe2O3  MAX 0.7%

Crystal system   Hexagonal

Color            Black

Micro Hardness   HV3100-3280

Grinding ability(compared with diamond as one)  0.25

Hardness(mohs)   9.15

Ture density    3.12 g/cm3

Bulk density     1.45-1.56g/cm3