Item

brand

Chemiacal clements

C

Si

Mn

Cr

Mo

Cu

Ni

P

S

High chrome casting iron ball

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

High chrome casting iron ball

JCCr15

2.0-3.0

≤1.0

0.5-1.5

14-17

0-.30

0-1.0

0-1.5

≤0.10

≤0.10

High chrome casting iron ball

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 ball

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 ball

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

Bainite ductile casting iron ball

JCSi3

3.2-3.8

2.0-3.5

2.0-3.5

2.0-3.0

——

——

——

≤0.10

≤0.03

Item

Sizes

Φ17

Φ20

Φ25

       Φ30

Φ40

Φ50

Φ60

Φ70

Φ80

Φ90

Φ100

Φ110

Φ120

Φ130

Tolerance

+1.0

+2.0

+3.0

+3.5

-1.0

-1.0

-1.0

-1.5

Difference Between

the Max & the Min Dia.

≤1.0

≤2.0

≤3.0

≤4.0