Hardmetal Gripper Inserts Brazed in Chuck Jaws Used in Diamond Drilling

Grades

Density

(g/cm³)

Hardness

(HRA)

T·R·S

(N/mm2)

Application

YG4C

15.00

89.5

1800

Maily used as small buttons for percussion bits and as the inserts of rotary prospecting bits to cut soft, medium-hard formations.

YG6

15.80

89.5

1700

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

YG8

14.70

88.5

2300

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

YG8C

14.70

88.0

2300

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

YG9C

14.50

87.0

2400

Maily used as the inserts and buttons for rotary-percussive bits, coal-cutting bits and tricone bits to cut medium-hard and hard formations.

YG11C

14.40

86.5

2450

Chiefly for the inserts and buttons of heavy rock drill bits and rotary-percussive bits, coal-cutting bits and tricone bits to cut medium-hard and hard formations.

YG13C

14.30

86.0

2500

Mainly used as the inserts and buttons of tricone bits rotary-percussive bits and heavy rock drill bits to cut medium-hard and hard formations.

YG15

14.00

86.5

2500

It is stronger, and is mainly used as the inserts and buttons of rotary-percussive bits, heavy rock drill bits to cut hard and very hard formations.

YG16

14.10-14.30

87.5

2400

It is mainly used for making cemented carbide substrate tips to be used in PDC cutters for excavating coal and oil field PDC bits.

YG20

13.40-13.70

85.0

2254

Mainly for the stamping dies used in the conditions of heavy impact load and large strees.