Grade

Performance & application recommended

Density

Hardness

TRS

g/cm³

HRA

MPa

YG4C

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

15.1

90.0

1800

YG6

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.

14.9

90.0

2100

YG8

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.

14.7

89.5

2400

YK05

Mostly used as the buttons of small and medium sized percussion bits and as the inserts of rotary prospecting bits to cut soft and medium hard formations.

14.95

90.5

2500

YG8C

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

14.7

88.5

2450

YK15

YG9C

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

14.7

87.8

2450

YG20

YG10C

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

14.4

87.0

2550

YK25

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

14.5

87.5

2600

YG11C

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

14.4

87.0

2600

YK40

YG13C

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

14.2

86.5

2650

YG15C

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

14.0

86.5

2700