Grade

Density (g/cm3)

Hardness(HRA)

TRS(N/mm2)

Recommended applications

YK15

14.60

88.0

2600

Suitable for embedding rotary percussive drill bits of light rock drilling

machines for drilling soft to medium rock formations of class f=14-16

YK15.6

14.60

87.6

2700

Suitable for embedding rotary percussive drill bits of medium rock drilling

machines for drilling medium to hard rock formations of class f=14-16

YK20

14.52

87.3

2800

Suitable for embedding rotary percussive drill bits of medium rock

drilling machines for drilling medium to hard rock formations of

class f=14-16

YG11C

14.35

87.0

2850

Suitable for embedding rotary percussive drill bits of heavy rock

drilling machines for drilling hard rock formations of class f=18 or

above.

grade Density Hardness TRS Recommended applications

YK25.6

14.58

87.5

2650

With a unique structure, it has a higher lifetime and drilling speed.

It is suitable for embedding rotary drill bits of medium drilling

machines for drilling medium hard and rather hard rock formations

of class f=14-16.

YK20.2

14.45

88.0

2700

It combines the advantages of the wear resistance of YK15.6 and

toughness of YK20 with rather good stability. The product is suitable

for drilling rock formations of class 15-17 after application on

a scale in Chenzhou, Hunan and Gansu, etc. , with a good drilling

speed as compared with the same category of products.

YK020

14.50

87.3

2650

It is an economical grade and it is suitable for embedding rotary

percussive drill bits after application on a scale in Gansu and

Shandong, etc. And it is suitable for drilling rock formations of

class 16 with a good ratio of performances and prices.

YK30.2

14.58

88.1

2750

It is coarse grain size cemented carbide with both good wear

resistance and impact resistance toughness, and stable performances.

It is suitable for drilling rock formations of class f=18

after application on a scale in Chenzhou and Shandong, etc. It

is suitable for drilling rock layers of class f=18 with a good drilling

speed and considerably improved lifetime.