Cemented carbide for rock drilling tools

Grade

Density g/cm³

Hardness HRA

Properties

Application

YG3X

 15.0-15.3

92

Having the highest wear-resistance, but the toughness is the worst

For the drawing of cast-iron and fine wire, and the wear-resistance is superior.

YG4C

14.9-15.2

90

Belonging the coarse tungsten carbide, the wear-resistance is higher than YG8S.

For geological prospecting, coal mining, tipping of electric and air drill  for coal bed.

YA6

14.4-15.0

92

Belonging the fine tungsten carbide, having more advantages than YG6X.

For the semi-fine machining of hard cast-iron & ferrous metal and alloy.

YG6

14.6-15.0

89.5

Having higher wear-resistance, but lower than YG3X.

For cast-iron, rough turning of threads, spiral turning and coarse & fine boring of holes.

YG6X

14.6-15.0

91

Belonging the fine tungsten carbide, having higher wear-resistance.

For machining cast-iron and thermal-resistance alloy, plain cast-iron, for making timber cutters.

YG8

14.4-14.8

89

Having higher strength, and the shock-resistance is better than YG6.

For rough turning, planning, milling and electric drill bits.

YG11C

14.0-14.4

87

Belonging the coarse tungsten carbide, the strength is a little worse than YG15.

For heavy rock drill bits.

YG15

13.9-14.1

87

The strength is higher than the above grades, but the wear-resistance is lower than the above grades.

For drawing and stamping dies.

YG20

13.4-13.5

89

Having the highest strength and best shock-resistance.

For making dies and cutters used under big shock and stress.

YT5

12.5-13.2

89.5

Having the best shock-resistance and vibration-resistance and the worse wear-resistance.

For machining of non-plain face for carbon steel and rough turning for incontinuous turning.

YT14

11.2-12.7

90.5

Having a little worse vibration-resistance than YT5,but the wear-resistance is higher than YT5.

For continuous rough milling, cast-irons boring and rough boring.

YT15

11.0-11.7

91

Having a worse vibration-resistance than YT14.

For carbon steels semi-fine &fine turning, spiral turning, semi-fine &fine milling.

YT30

9.3-59.7

92.8

Having higher wear-resistance and allowing faster cutting speed, the shock-resistance and vibration-resistance is worse.

For carbon steels fine turning and fine-boring.

YW1

13.0-13.3

91

Having a higher hardness at high temperature, is a kind of universal hard metal.

For machining abrasion resisting steel, manganese steel, stainless-steel, plain steel and cast-iron.

YW2

12.4-13.5

90.5

Having a higher strength, bearing a bigger shock capacity.

For rough machining and semi-fine machining abrasion resisting steel, manganese steel, stainless-steel, high-grade steel.