Grade

Density
g/cm³

T.R.S
MPa

Hardness
HRA

Performance & application recommended

Approx
Grades in
China

MK4C

15.1

1800

90.0

Mainly used as small buttons for percussion bits to cut soft and medium hard formations.

YG4C

MK6

14.9

2150

90.0

For coring crowns, electric coal drill bits, coal cutting picks, oil cone bits and scraping knife bits, used in geological prospecting, coal mining and oil well boring.

YG6

MK8

14.7

2320

89.5

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

MK05

14.9

2500

90.5

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 formations.

YK05

MK8C

14.7

2400

88.5

YG8C

MYK15

14.6

2450

87.6

Suitable to strips, conical buttons for rotary percussion resistant, geological prospecting buttons, cut soft and medium hard formations.

YK15
YG9C

MYK20

14.4

2500

86.8

Primarily for the buttons and inserts of rotary percussion bits to cut medium-hard and hard formations.

YK20
YG10C

MYK25

14.4

2550

87.2

Primarily for the buttons and inserts of rotary percussion bits to cut medium hard and very hard formations.

YK25

MK11C

14.3

2600

86.5

Largely for the inserts and buttons of percussion bits and tricone bits to cut medium-hard, hard, and very hard formations.

YG11C

MYK40

14.2

2650

86.0

Predominantly for the buttons of tricone bits and inserts of rotary percussion bits to cut hard and very hard formations.

YK40
YG13C

MK15C

14.0

2700

85.5

For oil cone drill bits, for medium soft and medium-hard rocks.

YG15C