Grinding Steel Ball

 

Forged Grinding Steel Ball

Executive standard for the product is YB/T091-2005 forging(rolling)steel balls

1.Chemical Composition

Material

C

Si

Mn

Cr

S

P

Ni

Cu

60Mn

0.50-0.65

0.15-0.37

0.6-1.2

≤0.25

≤0.04

≤0.04

≤0.25

≤0.25

B2

0.75-0.85

0.17-0.35

0.7-1.2

0.4-0.8

≤0.035

≤0.035

≤0.25

≤0.25

B3

0.50-0.65

1.35-1.85

0.4-1.0

0.8-1.2

≤0.035

≤0.035

≤0.25

≤0.25

 

 

 

 

 

 2. Size and hardness of the forged grinding ball

Diameter

(mm)

Tolerance

(mm)

Weight of single ball in average(g)

Number of piece of one ton ball in average

Surface hardness

(HRC)

Core

hardness

(HRC)

Impact toughness

(J/C㎡)

Φ20

Φ25

Φ30

Φ40

Φ50

+2

-1

32

64

110

263

513

31250

15625

9090

3802

1949

60-67

57-62

≥12

Φ60

Φ70

Φ80

Φ90

Φ100

+3

-2

888

1410

2104

2996

4110

1126

709

475

333

243

58-65

50-56

Φ110

Φ120

Φ130

+4

-2

5457

7102

9030

182

140

110

55-63

48-55

Φ140

Φ150

+4

-3

11278

13871

88

72

55-63

45-50

3. Product performance: High hardness,  Unbreakable, Good wear resistance, Low consumption rate.

4. Application fields: Mining, Cement Plants, Power Stations and Chemical Industries etc.