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)
Other supplier products
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Zinc sulfate |
Testing Items monohydrate heptahydrate
Appearance White powder --
Zinc Sulphate content % ≥ 96.09 99
Zn % ≥ 35 22.51
Pb % ≤ 0.001 0.00... |
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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 HRC57-6... |
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Sodium Sulphide |
Class 1 Class 2 Class 3
Test items Superior grade A first-rate product Acceptable product A first-rate product Acceptable product
Sodium Sulphid... |
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Toluene-2,4-diisocyanate |
Test items Index
Isocyanate % ≥99.0
Saponifiable chlorine % ≤0.01
Chlorine % ≤0.04
Crystallizing point℃ % 5.0-6.5
Chromaticity (Hazen... |
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Polyether polyol |
Model Hydroxyl value Water content Acid value pH value Potassium Chromaticity Viscosity Degree of unsaturation
mgKOH/g % mgKOH/g mg/Kg APHA mPa.s/... |
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