Special Mining Grade Facts

Grade	ISO Grade	Density g/cm3	Hardness HRA>	T.R.S>N/mm2	Performances or recommended applications
Special mining grade
YK5		14.80-15.10	89.0	2060	With high toughness and good wear resistance, it is suitable mainly for buttons and inserts used in small and medium size percussion drill bits for drilling medium hard rock formations
YK10		14.60-14.85	89.5	2260	With high toughness and good wear resistance, it is suitable mainly for buttons and inserts used in small and medium size percussion drill bits
YK20		14.30-14.60	86.5	2350	With high toughness and good wear resistance, it is suitable mainly for embedding rotary percussive drill bits for drilling medium hard and rather hard rock formations
YK25		14.35-14.70	87.0	2450	With high toughness and good wear resistance, it is suitable mainly for embedding rotary percussive drill bits for drilling medium hard and rather hard rock formations
YK40		13.90-14.20	86.5	2450	With high toughness and good wear resistance, it is suitable mainly for embedding rotary percussive drill bits for drilling medium hard and rather hard rock formations
YK45		13.80-14.20	86.0	2450	With high toughness and good wear resistance, it is suitable mainly for embedding rotary percussion drill bits for drilling medium hard and rather hard rock formations
YK50		13.80-14.20	85.5	2450	With ultra high toughness and good wear resistance, it is suitable mainly for embedding button drill bits, tri-cone drill bits for drilling medium-hard and rather hard rock formations