Item

Index

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 sintered

1600℃

Percentage of free acid present in the sand

0

filling density  

 2.6g/cm³

sintering point      

> 1800°C

melting temperature  

 2180°C

Regular size

AFS25-35 AFS30-35 AFS35-40 AFS40-45 AFS45-55 AFS50-55 AFS55-60 AFS60-65 AFS60-70