Complaint
| Grade | Density g/cm3 | Hardness HRA | T.R.S MP a | Performance&application recomended | Approx Grades in China | ISO |
| MK4 | 15.1 | 90.0 | 1800 | Mainly used as small buttons for percussion bits to cut soft and medium hard formation. | YG4C | K01~K05 |
| MK6 | 14.9 | 90.5 | 2600 | For coring crowns,electric coal drill bits,coal cutting picks,oil cone bits and scraping knife bits,used in geological prospection,coal mining and oil well boring. | YK05 KK06H | K10 |
| MK8 | 14.7 | 89.8 | 2800 | Suitable for coring crowns,electric coal drill bits, coal cutting picks, cone drill bits and scraping knife bits,used in geological prospecting,coal mining and oil well boring. | YG8 | K20 |
| MK10 | 14.7 | 89.0 | 2700 | Mostly used as the buttons of small and mediumsized percussion bits and as the inserts of rotary prospecting bits to cut soft and medium hard formatin | YG8C ZD15 | K20 |
| MK15 | 14.6 | 88.0 | 2750 | Suitable to strips,conical buttons for rotary percussion-resistance, geological prospecting buttons,cut soft and medium hard formations. | YK15 YG9C | K20~K30 |
| MK20 | 14.5 | 87.5 | 2800 | Primarily for the buttons and inserts of rotary percussion bits to cut medium-hard and hard formations. | YK20 YG10C | K30 |
