CH-1

SF-35

SF-34

SF-32

Spec

Typical

Spec

Typical

Spec

Typical

Spec

Typical

Chemical
Analysis (%)

Al2O3

38≤

40

42≤

46

40≤

43

34≤

35

Fe2O3

2.0≥

1.7

1.5≥

1.2

1.5≥

1.2

2.0≥

1.3

Refractoriness (SK)

34≤

34

35≤

35

34≤

34

32≤

32

Bulk Density

2.20≤

2.30

2.30≤

2.33

2.25≤

2.32

2.15≤

2.20

Apparent Porosity (%)

20≥

17

17≥

13

17≥

15

17≥

15

Cold Crushing Strength

350≤

450

500≤

700

500≤

650

400≤

500

(Kg/cm²)

Thermal Expansion (%)

-

0.57

-

0.58

-

0.56

-

0.60

 at 1000

Permanent Linear Change (%)

-

0.2

-

1500
0.2

-

1500
0.2

-

0.2

at 1350 × 2Hrs

Refractoriness under Load

-

1,400

-

1,500

-

1,500

-

1,400

(2Kg/cm², T2)

N1-1

N2-1

N3-1

Spec

Typical

Spec

Typical

Spec

Typical

Chemical
Analysis (%)

Al2O3

38≤

40

32≤

35

31≤

33

Fe2O3

2.5≥

1.9

2.5≥

2.0

2.5≥

2.0

Refractoriness (SK)

34≤

34

33≤

33

32≤

32

Bulk Density

2.00≤

2.25

1.95≤

2.20

1.90≤

2.15

Apparent Porosity (%)

24≥

19

24≥

19

26≥

19

Cold Crushing Strength

200≤

400

200≤

350

200≤

350

(Kg/cm²)

Thermal Expansion (%)

-

0.56

-

0.52

-

0.53

 at 1000

Permanent Linear Change (%)

-

0.5

-

0.5

-

1350
0.5

at 1400 × 2Hrs

Refractoriness under Load

-

1,370

-

1,360

-

1,360

(2Kg/cm², T2)