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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 | |
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