60mm hardness cast iron grinding media steel balls 2.5inch

Diameter(mm)

Φ<30

30<Φ<60

60<Φ<80

80<Φ<100

Φ>100

Diameter tolerance(mm)

+1,-1

+1.5,-1

+2,-1

+2.5,-1

+3,-1

Name

Brand

Chemical composition(%)

C

Si

Mn

Cr

Mo

Cu

Ni

P

S

Chrome alloy casting iron ball

ZQCr26

2.0-3.3

1.2max

0.3-1.5

>23.0-30.0

0-3.0

0-1.2

0-1.5

≤0.10

≤0.06

ZQCr20

2.0-3.3

1.2max

0.3-1.5

>18.0-23.0

0-3.0

0-1.2

0-1.5

≤0.10

≤0.06

ZQCr15

2.0-3.3

1.2max

0.3-1.5

>14.0-18.0

0-3.0

0-1.2

0-1.5

≤0.10

≤0.06

ZQCr12

2.0-3.3

1.2max

0.3-1.5

>10.0-14.0

0-3.0

0-1.2

0-1.5

≤0.10

≤0.06

ZQCr8

2.1-3.3

2.2max

0.3-1.5

7.0-10.0

0-1.0

0-0.8

-

≤0.10

≤0.06

ZQCr5

2.1-3.3

1.5max

0.3-1.5

4.0-6.0

0-1.0

0-0.8

-

≤0.10

≤0.10

ZQCr2

2.1-3.6

1.5max

0.3-1.5

1.0-3.0

0-1.0

0-0.8

-

≤0.10

≤0.10

Name

Brand

Diameter

(mm)

Hardness

(HRC)

Breakage rate

Impact value

(J/cm²)

Drop times

Micro structure

Chrome alloy casting iron ball

ZQCr26

17-150

>58

<1%

>7

≥12000

M+C

ZQCr20

17-150

>58

<1%

>6

≥12000

M+C

ZQCr15

17-150

>58

<1%

>5

≥12000

M+C

ZQCr12

17-150

>58

<1%

>3.5

≥12000

M+C

ZQCr8

17-150

>58

<1%

>3

≥12000

M+C

ZQCr5

17-150

>47

<1%

>2

≥10000

M+C

ZQCr2

17-150

>45

<1%

>1.5

≥8000

P+C