CBN Inserts 1) high hardness 2) good wear resistance 3) little coefficient of friction 4) good adhesiveness resistanc CBN inserts1.perfomance :excellent wear-resistance and shock-resistance.2.material : CBN blanks made-in-China and imported are available here.3.application: turning various Hardened steel HRC 50-67 ,gray cast iron about HB200,high hardness cast iron HRC 50-64,powder metallurgy ...