Type and Chemical Composition of Forged Balls

Name

C

Mn

Si

Cr

S

P

45Mn

0.42-0.50

0.50-0.80

0.17-0.37

<0.25

micro-

micro-

50Mn

0.48-0.56

0.70-1.00

0.17-0.37

<0.25

micro-

micro-

60Mn

0.57-0.65

0.70-1.00

0.17-0.37

<0.25

micro-

micro-

65Mn

0.62-0.70

0.90-1.20

0.17-0.37

<0.25

micro-

micro-

70Mn

0.67-0.75

0.90-1.20

0.17-0.37

<0.25

micro-

micro-

75MnCr

0.70-0.85

0.7-0.8

0.17-0.37

0.2-0.7

micro-

micro-

75SiMn

0.70-0.90

0.7-1.2

0.4-0.8

<0.25

micro-

micro-

Type and Chemical Composition of Cast Iron Balls

Name

Cr

Mn

C

Si

S

P

Special Hi-Cr I

22-32

0.5-2.0

2.0-2.8

1.0max

0.06max

0.08max

Special Hi-Cr II

17-22

0.5-2.0

2.0-2.8

1.0max

0.06max

0.08max

Special Hi-Cr III

15-17

0.5-2.0

2.2-3.0

1.0max

0.06max

0.08max

High-Cr

11-14

0.5-2.5

2.2-3.2

1.0max

0.06max

0.08max

Medium-Cr

5-10

0.5-1.5

2.1-3.2

1.2max

0.06max

0.08max

Low-Cr

1.5-3.0

0.5-1.5

2.2-3.5

1.2max

0.06max

0.08max