low price forged steel ball for mining process

Brand

Materials 

C

Mn

Si

Cr

S

P

CU

JC-1

50Mn

0.48-0.56

0.70-1.0

0.17-0.37

≤0.25

≤0.035

≤0.035

JC-2

60Mn

0.57-0.65

0.70-1.0

0.17-0.37

≤0.25

≤0.035

≤0.035

JC-3

65Mn

0.60-0.70

0.90-1.2

0.17-0.37

≤0.25

≤0.035

≤0.035

JC-4

75MnCr

0.70-0.85

0.7-0.8

0.17-0.37

0.20-0.60

≤0.030

≤0.030

≤0.020

JC-5

B3

0.62-0.67

0.7-1.0

1.4-1.8

0.7-1.2

≤0.035

≤0.035

≤0.014

JC-5

B6

0.75-0.9

0.8-1.02

0.17-0.37

0.88-0.98

≤0.035

≤0.035

Specification of forged steel Grinding balls 

Nominal diameter 

Diameteical

Tolerance 

Weight of single ball in average 

Surface hardness 

Impact toughness 

(mm)

(mm)

(g)

(HRC)

(j/cm2 )

Φ20

+2      -1

32

57-65

≥12

Φ25

64

Φ30

110

Φ40

263

Φ50

513

Φ60

+3    -2

888

55-62

Φ70

1410

Φ80

2104

Φ90

2996

Φ100

4110

Φ110

+4     -2

5457

55-60

Φ120

7102

Φ130

9030

Φ140

+4    -3

11278

Φ150

13871