GRAIN SIZE DISTRIBUTION AND PHYSICAL CHARACTERISTICS OF COATED SAND
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Measure unit | Value | |
Residue > 0,500 mm | % | max. 3,0 |
Residue <0,125 mm | % | max. 2,5 |
Uniformity ratio | % | min. 70 |
AFS number | / | 50 – 60 |
Medium grain size, d50 | mm | 0,22 – 0,27 |
CHARACTERISTICS OF COATED SAND
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Strength in hot,280ºϹ/90sec | MPa | min. 0,60 |
Peel-back, 200ºϹ /300sec | % | max. 20 |
Loss on ignition, 900ºϹ (2h) | % | 1,80 – 2,50 |
CHEMICAL ANALYSIS OF BASIC SAND
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SiO2 | % | min.98,50 |
Al2O3 | % | max.0,80 |
Fe2O3 | % | max.0,05 |
Moisture content | % | max.0,50 |
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