Materials

Hardness

Impact value

Wear in Cement Mills (g/mt)

Application Field

High Cr

Cast Iron

≥HRc60

≥4J

25-60

The dry-grinding process in cement works, power plants and wet-grinding process in mine;

Low Cr

 Cast Iron

≥HRc46

≥3J

≤130

The dry-grinding process in cement works, power plants and wet-grinding process in mines

Composition

 (%)

C

Si

Mn

Cr

P

S

Hardness

(HRC)

Wear Rate in Gold Mine

Low Cr Cast Balls

2.0~3.0

0.5~1.5

≤0.50

1.5~2.5

≤0.07

≤0.07

46~55

About 1000g/MT

Mid Cr Cast Balls

2.0~3.5

≤1.0

0.3~1.2

4.0~6.0

≤0.10

≤0.10

≥50

About 870g/MT

Cr12 Cast Balls

2.0~3.0

≤1.2

0.7~2.0

10~12

≤0.06

≤0.06

≥55

≤820g/MT

Cr15 Cast Balls

2.0~3.0

≤1.2

0.7~2.0

14~16

≤0.06

≤0.06

≥58

Cr20 Cast Balls

2.0~3.5

≤1.0

0.5~1.5

17~23

≤0.06

≤0.06

≥60

≤760g/MT

Composition (%)

C

Si

Mn

Cr

P

S

Type One Material

0.57~0.65

0.17-0.37

0.70-0.80

0.28-0.60

≤0.04

≤0.04

Size

Surface

Core

Φ40~60mm

HRC50~60

HRC50~60

Φ70~80mm

HRC50~60

HRC50~60

Φ90~100mm