chrome sand flour for precision casting

CHROME SAND FLOUR FOR PRECISION CASTING PHYSICAL AND CHEMICAL INDEX Item Unit Index Cr2O3 % 44.0-47.0% SiO2 % ≤2.0% FeO % ≤26.5% CaO % ≤0.30% MgO % ≤10.0% Al2O3 % ≤15.5% P % ≤0.003% S % ≤0.003% Cr/Fe 1.55:1 Bulk Density g/cm³ 2.5-3 Color / Black PH / 7-9 The amount of the acid / ≤ 2 ML Percent soil % ≤0.1 Percent Moisture % ≤0.1 The sintered ℃ 1600 Percentage of free acid present in the sand % 0 filling density g/cm³ 2.6 sintering point °C > 1,800 melting temperature °C 2,180