Chemical Composition

Name

Designation

Chemical Composition(%)

C

Si

Mn

Cr

P

S

Grinding media Balls

ZQCr26

2.0~3.3

≤1.2

0.3~1.5

>23~30

≤0.10

≤0.06

ZQCr20

2.0~3.3

≤1.2

0.3~1.5

>18~23

≤0.10

≤0.06

ZQCr15

2.0~3.3

≤1.2

0.5~1.5

>14~18

≤0.10

≤0.06

ZQCr12

2.0~3.3

≤1.2

0.5~1.5

>10~14

≤0.10

≤0.06

ZQCr8

2.1~3.3

<2.2

0.3~1.5

7~10

≤0.10

≤0.06

ZQCr5

2.1~3.3

<1.5

0.3~1.5

4~6

≤0.10

≤0.10

ZQCr2

2.1~3.6

<1.5

0.3~1.5

1~3

≤0.10

≤0.10

Physical Property

Name

Designation

Surface  Hardness

Core Hardness

Microstructure

Times of Falling Balls

(HRC)

(HRC)

Grinding media Balls

ZQCr26

>58

>56

M+C

≥15000

ZQCr20

>58

>56

M+C

≥15000

ZQCr15

>58

>56

M+C

≥15000

ZQCr12

>58

>56

M+C

≥15000

ZQCr8

>50

>47

P+C

≥10000

ZQCr5

>48

>45

P+C

≥10000

ZQCr2

>46

>45

P+C

≥10000

M-Martensite  P-Pearlite  C-Carbide