... . 0.35% 2. Fe2O3 0.5% 3.Ture density:3.9 4.Hardness(mohs):9.15 5 Color:blackIntroductionsBlack ... some degree.The abrasives made of it are suitable for working on cast iron,non-ferrous metal,rock, ... size: 16#,20#,24#30#,36#,46#,54#,60#,80#,100#,120#,150#,180#,220#Micropowder:240#,280#,320 ... mohs) 9.15Ture density 3.12 g/cm3Bulk density 1.45-1.56g/cm3Application1. it are suitable for grinding high-speed ...