Wearable steel ball
Forged grinding steel balls
Size Surface Core
DIA 40-60 mm HRC60-64 HRC59-63
DIA 70-80 mm HRC60-64 HRC58-62
DIA 90-100 mm HRC60-64 HRC57-61
DIA 110-140 mm HRC55-60 HRC52-58
Casting grinding steel balls
HRC Name Trademark Falling ball impact fatigue life (number of)
Quenched Non-quenched
ZQCr26 ≥56 ≥45 ≥8000
High-chromium cast iron ball
ZQCr20 ≥56 ≥45 ≥8000
High-chromium cast iron ball
ZQCr15 ≥56 ≥49 ≥8000
High-chromium cast iron ball
ZQCr8 - ≥48 ≥8000
Moderate-chromium cast iron ball
ZQCr2 - ≥45 ≥8000
Low-chromium cast iron ball
ZQSi3 ≥50 - ≥8000
Bainitic ductile iron grinding
Casting Grinding Ball Specifications)
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