Ultra high chrome casting alloy grinding ball

Diameter(mm)

&;8

&;10

&;12

&;15

&;17

&;20

&;25

&;30

&;40

&;50

&;60

&;70

&;80

&;90

&;100

&;110

&;120

&;130

Chemical Composition

Name

Designation

C

Si

Mn

Cr

P

S

Rare earth

Ultra High chrome casting grinding ball

ZQCr15

2.0-3.3

≤1.0

0.3-1.5

14-16

≤0.08

≤0.08

Trace

ZQCr20

2.0-3.3

≤1.0

0.3-1.5

18-22

≤0.08

≤0.08

Trace

ZQCr26

2.0-3.3

≤1.0

0.3-1.5

23-30

≤0.08

≤0.08

Trace

Properties and Microstructure

Name

Designation

Surface Hardness（HRC

Core Hardness (HRC)

Impact Value(J/CM2)

Microstructure

Time of falling balls

Ultra High chrome casting grinding ball

ZQCr15

≥58

≥56

4

M+C

≥15000

ZQCr20

≥58

≥56

4

M+C

≥15000

ZQCr26

≥58

≥56

4

M+C

≥15000

Tolerance of Diameter

Diameter

&;10-&;25

25<&;<60

60<&;≤100

100<&;

Tolerance of Diameter

+1.0

+1.5

+2.0

+3.0

-1.0

-1.0

-1.0

-1.0