SILRATH ANDALUSITE HIGH-ALUMINA BRICKS

SILRATH ANDALUSITE HIGH-ALUMINA BRICKS


Andalusite High-Alumina Bricks

SILRATH andalusite base bricks are dense, high-alumina bricks with very low flux levels and relatively low porosity. SILRATH bricks are characterized by excellent high-temperature load resistance and outstanding thermal shock resistance. This exceptional resistance to thermal shock allows these brick to withstand repeated cycles of up to 120 times from a hot furnace to a cold bath.



SILRATH ANDALUSITE HIGH-ALUMINA BRICKS
Properties Units AK 60 AK 70
Density lbs/ft³
(g/cm³)
162
(2.6)
168
(2.7)
Apparent Porosity % ≤12 ≤15
Cold Crushing Strength Psi
(MPa)
10,100
70
13,000
100
Creep in compression@
constant temp. 0.1 Mpa Test
Temp. 1500ºC
e25[%]

s25-15[%]
2.11

0.034
2.7

0.052
Thermal Shock Resistance
DIN 51068 Part 1

Cycles > 120 > 100
Thermal Conductivity by the
hot wire method:

@ 800°C
@ 1000°C
@ 1200ºC
@ 1400ºC
°C 2.02
2.12
2.32
2.64
2.15
2.32
2.60
2.99
Hot Modulus Of Rupture Psi
(MPa)
260
(1.8)
@ 1400°C
405
(2.8)
@ 1500°C
Chemical Analysis
Al2O3
Si02
Fe203
% 61
36
≤1.8
70
28
1


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