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

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