forged grinding steel ball DIA 20mm-150mm

Name

C

Mn

Si

Cr

S

P

V

50MN

0.48-0.56

0.70-1.0

0.17-0.37

0.25 max

0.035max

0.035max

60MN

0.57-0.65

0.70-1.0

0.17-0.37

0.25 max

0.035max

0.035max

65MN

0.60-0.70

0.90-1.20

0.17-0.37

0.25 max

0.035max

0.035max

75Mn

0.72-0.92

0.17-0.37

0.7-1.0

0.4-0.6

0.035max

0.035max

75MnCr

0.70-0.85

0.7-0.8

0.17-0.37

0.2-0.7

0.03 max

0.03 max

75 SiMn

0.70-0.90

0.7-1.2

0.4-0.8

0.25 max

0.03 max

0.03 max

Wear-resistant Alloy

0.5-0.65

0.4-1.0

1.4-1.8

0.9-1.2

0.03 max

0.03 max

0.1-0.2

Name

Impact Test

AK.J/cm2

Endurance Test Times

(5m)

Dia 25mm-60mm

Dia 70mm-100mm

Surface

Core

Surface

Core

50MN

≥12

≥10000

≥56

≥35

≥56

≥28

60MN

≥13

≥10000

≥58

≥38

≥58

≥29

65MN

≥15

≥12000

≥60

≥42

≥60

≥30

75MnCr

≥17

≥12000

≥60

≥52

≥60

≥50

75 SiMn

≥16

≥12000

≥60

≥50

≥60

≥48

Wear-resistant Alloy

≥17

≥12000

≥60

≥54

≥60

≥52