25mm forged steel grinding ball

C

Si

Mn

Cr

S

p

0.50~0.65

0.15~0.37

0.6~1.2

<=0.25

<=0.04

<=0.04

0.7~0.9

0.45~0.75

0.7~1.25

0.11~0.4

<=0.04

<=0.04

Nominal diameter(mm)

Diametrical tolerance(mm)

Weight of single forging ball in average(g)

Number of piece of one ton forging ball in average

Surface hardness(HRC)

IMPACT TIUGHNESS(j/cm2)

 dia20

 dia25

 dia30

 dia40

 dia50

       +2

       -1

       32

       64

       110

       263

       513

      31250

      15625

        9090

        3802

        1949

   50~65

  >=12

 dia60

 dia70

 dia80

 dia90

 dia100

       +3

       -2

       888

      1410

      2104

      2996

      4110

        1126

         709

         475

         333

         243

   50~65

  >=12

 dia110

 dia120

 dia130

       +4

        -2

      5457

      7102

      9030

         182

         140

         110

    45~60

   >=12

 dia140

 dia150

      +4

       -3

     11278

     13871

          88

          72

    45~60

   >=12

Name

Materials

Impact Test(Ak.J/cm²)

Endurance Test Times(5m/T)

Surface Hardness

(Φ25mm- Φ60mm)

Core Hardness

(Φ25mm- Φ60mm)

Surface Hardness

(Φ70mm- Φ100mm)

Core Hardness

(Φ70mm- Φ100mm)

Breakage

DZ-1

50Mn

≥12

≥10000

≥56

≥35

≥56

≥28

<1%

DZ-2

60Mn

≥13

≥10000

≥58

≥38

≥58

≥29

<1%

DZ-3

65Mn

≥15

≥12000

≥60

≥42

≥60

≥30

<1%

DZ-4

B2

≥17

≥12000

≥60

≥52

≥60

≥50

<1%

DZ-5

75SiMn

≥16

≥12000

≥60

≥50

≥60

≥48

<1%

DZ-6

Wear-resistant Alloy

≥17

≥12000

≥60

≥54

≥60

≥52

<1%