Note: This is a variation of Alumina (Porous) (3200ºF – 3600ºF Range).

Foundry Service offers Porous Alumina compositions from 88% to 99.7% alumina content. TA-530 is a nominal 90% alumina material that is excellent for molten metal contact, kiln furniture, and miscellaneous shapes. TA-530 combines high strength and thermal shock resistance yielding a versatile alumina product that is suitable in a wide variety of applications. TA-540 is a modified version of TA-530 that is best suited for miscellaneous kiln furniture. The higher content aluminas arcell namexcellent for use when silica content is critical. TA-505 is suitable for induction melting under vacuum due to a lower silica content while retaining thermal shock resistance. TA-507 is excellent for use in vacuum or hydrogen atmospheres due to the lowered silica content. TA-510F is preferred in hydrogen or vacuum atmospheres and has excellent strength at elevated temperatures.


Maximum Operating Temperature ( ºC )3600
Maximum Operating Temperature ( ºF )1980
Apparent Porosity ( % )14.0
Bulk Density ( g/cm³ )3.1
Bulk Density ( lb/ft³ )195
Modulus of Rupture (Room Temperature) ( MPa )46.9
Modulus of Rupture (Room Temperature) ( psi )6800
Nominal Chemical CompositionAl2O3 - 99.7
Fe2O3 - <0.1
SiO2 - <0.1
Other - <0.2
Hot Modulus of Rupture (at 2700ºF for 12 hrs.) ( MPa )9.3
Hot Modulus of Rupture (at 2700ºF for 12 hrs.) ( psi )1350
Thermal Stock ResistancePoor
Alumina Content (%)99.7
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