1. The overall high hardness: surface hardness of 57-67 HRC, volume hardness of 56-64 HRC, and the hardness gradient distribute evenly.
2. High impact toughness: more than 12 J/CM2
3. Low broken rate: anti-broken and anti-broken off performance is 10 times of general casting steel ball, balls impact times over 20,000 times, the actual broken rate is less then 1%, close to no broken.
C.chemical composition:
1.material A
C 0.75 Si 0.23 Mn 0.74
P 0.016 S 0.001 Ni <0.01
Cr 0.48 Cu 0.02 Mo 0.004
2.material B
C 0.61 Si 1.80 Mn 0.75
P 0.012 S 0.001 Ni 0.01
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