low chrome cast grinding ball

Grinding Balls-Low Chrome

Low chrome cast grinding ball

Specification

Ball Diameter(mm)

10

12.7

15

17

20

25

30

40

50

60

70

80

90

100

110

120

125

130

Chemical Composition

Designation Chemical Composition
C Si Mn Cr Mo P S
Low chrome grinding ball 2.2-3.5 0.3-1.4 0.2-1.5 0.3-3.0 ≤1.0 ≤0.15 ≤0.15

Mechanical Properties and Microstructure

Designation (HRC) Ak(J/cm2) Microstructure Time of Falling Balls
(B)
Low chrome grinding ball ≥46 ≥1.5 P+C ≥15000

The balls with Chromium content ≤3.0% and the carbon content between 1.80% -3.30% are low chrome cast grinding ball. Its hardness (HRC) must be above 45 degrees in the national standard. In order to ensure performance of low chrome cast grinding ball, it is recommended must be tempered or heat treatment VSR. If the hardness (HRC) is below 40 degrees then the ball is lack of hardness or over-burnt.