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Casting grinding steel balls
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C
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Si
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Mn
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P
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S
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Cr
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HRC
|
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Low-chrome steel ball
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2.2-3.4
|
1.2max
|
0.5-1.5
|
0.08max
|
0.06max
|
1.5-3.5
|
46min
|
|
Medium-chrome steel ball
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2.0-3.2
|
1max
|
0.5-2.5
|
0.08max
|
0.06max
|
11min
|
56-62
|
|
High-chrome steel ball
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2.0-3.2
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1max
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0.5-2.5
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0.08max
|
0.06max
|
15min
|
58-64
|