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NAME

BRAND

CHEMICAL ELEMENTS %

C

Si

Mn

Cr

Mo

Cu

Ni

P

S

HIGH CHROME CASTING IRON BALL

ZQCr26

2.0~2.8

≤1.0

0.5~2.0

22~28

0~1.0

0~2.0

0~1.5

≤0.10

≤0.06

HIGH CHROME CASTING IRON BALL

ZQCr20

2.0~2.8

≤1.0

0.5~2.0

18~22

0~2.5

0~1.2

0~1.5

≤0.10

≤0.06

HIGH CHROME CASTING IRON BALL

ZQCr15

2.5~3.2

≤1.0

0.5~2.0

10~17

0~3.0

0~1.0

0~1.5

≤0.10

≤0.06

MIDDLE CHROMECASTINGIRON BALL

ZQCr8

2.1~3.2

0.5~2.2

0.5~2.0

6~10

1~1.0

0~0.8

0~1.5

≤0.10

≤0.06

LOW CHROME CASTING IRON BALL

ZQCr2

2.2~3.6

≤1.2

0.5~2.0

1.0~3.0

0~1.0

0~0.8

—

≤0.10

≤0.10

BAINITE DUCTILE CASTING IRON BALL

ZQSi3

3.2~3.8

2.0~3.5

2.0~3.0

­—

—

—

—

≤0.10

≤0.03

NAME

BRAND

SURFACE HARDNESS(HRC)

ENDURANCE IMPACT TEST(TIMES)

QUENCHED

UNQUENCHED

HIGH CHROME CASTING IRON BALL

ZQCr26

≥56

≥45

≥8000

HIGH CHROME CASTING IRON BALL

ZQCr20

≥56

≥45

≥8000

HIGH CHROME CASTING IRON BALL

ZQCr15

≥56

≥49

≥8000

MIDDLE CHROMECASTINGIRON BALL

ZQCr8

—

≥48

≥8000

LOW CHROME CASTING IRON BALL

ZQCr2

—

≥45

≥8000

BAINITE DUCTILE CASTING IRON BALL

ZQSi3

≥50

—

≥8000

ITEMS

SIZES

f10

f15

Φ20

Φ25

Φ30

Φ40

Φ50

Φ60

Φ70

Φ80

Φ90

Φ100

Φ110

Φ120

Φ130

TOLERANCE

+1.0

+2.0

+3.0

+3.5

-0.5

-1.0

-1.0

-1.5

DIFFERENCE BETWEEN MAX DIAM AND MIN DIAM

≤1.0

≤2.0

≤3.0

≤4.0