Grade

Physical and Mechanical Properties

Applications Recommended

Density                 g/cm³

Hardness no less than           HRA(HV)

TRS         Mpa

YK15

14.6

88

2600

Suitable for embedding rotary percussive   drill bits of light rock drilling machines for drilling soft to medium rock   formations of class f=14-15.

YK15.6

14.6

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=14-15.

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=15-18.

YG11C

14.35

87

2850

Suitable for embedding rotary percussive   drill bits of heavy rock drilling machines for drilling hard rock formations   of class f=18 or above.

YK25.6

14.58

87.5

2650

With a unique structure, it has a higher   lifetim 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

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

14.5

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 11-13 with a good ratio of performances and prices.