Name

Designation

Chemical Composition(%)

C

Si

Mn

Cr

Mo

Cu

Ni

P

S

High Chrome Casting iron Balls

JCCr20

2.0-3.0

≤1.0

0.5-1.5

18-22

0-2.5

0-1.2

0-1.5

≤0.10

≤0.10

JCCr15

2.0-3.0

≤1.0

0.5-1.5

14-17

0-3.0

0-1.0

0-1.5

≤0.10

≤0.10

High Chrome Casting iron Balls

JCCr13

2.0-3.0

≤1.0

0.5-1.5

11-14

0-1.0

0-2.0

0-1.5

≤0.10

≤0.10

Middle Chrome Casting iron Balls

JCCr7

2.1-3.2

0.5-2.2

0.5-1.5

6-10

0-1.0

0-0.8

0-1.5

≤0.10

≤0.10

Low Chrome Casting iron Balls

JCCr2

2.2-3.6

≤1.2

0.5-1.5

1.0-3.0

0-1.0

0-0.8

_

≤0.10

≤0.10

Name

Designation

Hardness(HRC)

AK(j/cm²)

Microstructure

Times of Falling Balls

Quenched

Unquenched

High Chrome Casting iron Balls

JCCr20

≥56

≥45

≥4.0

M+C

≥8000

High Chrome Casting iron Balls

JCCr15

≥56

≥45

≥4.0

≥8000

JCCr13

≥56

≥49

≥4.0

≥8000

Middle Chrome Casting iron Balls

JCCr7

_

≥48

≥4.0

≥8000

Low Chrome Casting iron Balls

JCCr2

_

≥45

≥4.0

≥8000