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By certification 
Material:High Chrome White Cast Iron
Size:Dia. 10 – 125 mm
Composition %:C 2.0-3.0, Cr 10.0-30.0, Si 0.8 max, Mn 1.0 max, S / P 0.08 max, Ni / Mo 0.5 max
Hardness:60 – 65 HRC
Breakage:0.5% Max
Impact:3.5 J/cm2 min
Tolerance (mm):10 / 12.7 / 15 / 17 / 20 / 25 mm Balls: +1 / -0.5
30 / 35 / 40 / 50 mm Balls: +2 / -1
60 / 63.5 / 70 / 75 / 80 / 90: +3 / -1
100 / 110 / 120 / 125 mm Balls: +3.5 / -1.5
Size:Dia. 10 – 125 mm
Composition %:C 2.0-3.0, Cr 10.0-30.0, Si 0.8 max, Mn 1.0 max, S / P 0.08 max, Ni / Mo 0.5 max
Hardness:60 – 65 HRC
Breakage:0.5% Max
Impact:3.5 J/cm2 min
Tolerance (mm):10 / 12.7 / 15 / 17 / 20 / 25 mm Balls: +1 / -0.5
30 / 35 / 40 / 50 mm Balls: +2 / -1
60 / 63.5 / 70 / 75 / 80 / 90: +3 / -1
100 / 110 / 120 / 125 mm Balls: +3.5 / -1.5