Cr2O3: ≥46.0%

SiO2: ≤1.0%

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:2.5-3

Color:Black

PH:7-9

The amount of the acid:≤ 2 ML

Percent soil:≤0.1%

Percent Moisture:≤0.1%

The sintere:1600℃

Percentage of free acid present in the sand:0

filling density :2.6g/cm³

sintering point:> 1800°C

melting temperature:2180