Its main material is fused alumina,which is electrically fused in high temperature,being added with the right quantity of oxidized chromium.
It is pink and its hardness is close to WA,but toughness higher than that
or WA.The abrasive tools made of it feature excellent durability and high processing cleanness,which are suitable for the precision grinding of the measuring tools,lathe main shafts,instruments and apparatus parts,threading work pieces and samplers,etc.

Specificaions
Low Chromium
F12-F80:  Al2O398.5,   Cr2O3 0.20-0.45,   Na2O0.50
F90-F150:  Al2O398.5,   Cr2O3 0.20-0.45,   Na2O0.50
F180-F220:  Al2O398.5,   Cr2O3 0.20-0.45,   Na2O0.50


Medium Chromium
F12-F80:  Al2O398.2,   Cr2O3 0. 45 -1.00,   Na2O0.55
F90-F150:  Al2O398.2,   Cr2O30. 45 -1.00,   Na2O0.60
F180-F220:  Al2O398.8,   Cr2O30. 45 -1.00,   Na2O0.70


High Chromium
F12-F80:  Al2O397.4,   Cr2O3 1.00-2.00,   Na2O0.55
F90-F150:  Al2O397.0,   Cr2O31.00-2.00,   Na2O0.60
F180-F220:  Al2O396.5,   Cr2O31.00-2.00,   Na2O0.70