Grade

Physical and mechanical properties

Application

Density

g/cm3

Hardness

HRA

Flexural strength

MPa

YB06

≥14.6

≥90.4

≥2000

Insert on electric coal drill, to drill in coal bed without pyrites, and anthracite coal bed. It also can drill in schist without ore period, leopoldite, halite and other same rock layer.

 

YB08

≥14.4

≥90.0

≥2100

Apply to insert _disibledevent=8, hard and super hard coal bed, and anthracite coal bed. It also apply to machining natural stone and brick, or drilling hole on concrete wall, etc.

 

YB10

≥14.2

≥89.0

≥2200

Apply to insert _disibledevent=14. It also use as coal cutting bit for coal bed with hard band, or use on oilwell bits, and drill bits for hard rock, or machining hard stone.

 

YB11

≥14.1

≥88.0

≥2250

Apply to insert on percussion & rotation rock drilling bits to drill in medium-hard and hard rock layer.

 

YB12

≥14.0

≥87.5

≥2350

Apply to insert on percussion & rotation rock drilling bits to drill in medium-hard and hard rock layer.

 

YB13

≥13.9

≥86.5

≥2600

Use as chip bit or cylindrical bit of heavy rock drill to drill in hard rock layer.It also use on roller bits, or insert on hole drilling bit for stone or concrete wall in installtion work.