Type

:

70 % Alumina Brick

Method of Manufacture

:

Machine Pressed

Nature of Bond

Maximum Service Temperature

:

:

Ceramic

1450oC

CHEMICAL COMPOSITION

SPECIFICATION

TYPICAL VALUES

Al2O3

%

Min. 70.0

71.20

Fe2O3

%

Max. 3.0

2.53

PHYSICAL PROPERTIES

Apparent Porosity

%

Max. 23

19.5

Bulk Density

g/cc

Min. 2.60

2.65

Cold Crushing Strength

kg/cm2

Min. 500

585

THERMAL PROPERTIES

P.C.E (Refractoriness)

orton / OC

Min.36 (1804)

+36 / (1804)

R.U.L. ta

OC

Min 1450

1460

P.L.C at 1500OC /2 hrs.

%

Max. +2.5

+ 1.72

Thermal Expansion at 1000OC

%

–

0.59

Thermal Conductivity

w/mK

–

At 1000OC Hot Face Temperature

–

1.94