... Stable Quality Grade, properties and application of mining tool parts:GradeEquivalentTo ISODensity(g/cm3)HRAT.R.S(Mpa) ApplicationYC4C ... crowns, electronic coal drill bits, coal cutting picks, oil cone bits and scraping knife bits, applied in geological prospecting, ... coring crowns, electric coal drill bits, coal cutting picks, cone drill bitsand scraping knife bits, used in geological prospecting, ...