ZIRCHROM HC
Sintered 30% chrome-alumina
High creep resistance with low chrome sublimation level. Good resistance to vapour environment.
Typical application
ZIRCHROM HC is dedicated to superstructure application for insulation glass furnaces. With a high creep resistance and a good corrosion resistance, ZIRCHROM HC is specifically suitable in crown application for gas-fired furnace operating at high temperature.
Chemical and physical properties
Typical chemical composition
Typical crystallographic analysis
- Cr2O3-Al2O3 solid solution
- Corundum
- Monoclinic zirconia
Physical characteristics
| Description | International standards | British standards |
|---|---|---|
| Refractoriness under load 0.2Mpa 0.5% | >1,745°C | >3,173°F |
| Cold crushing strength | 150MPa | 21,756psi |
| Coefficient of thermal expansion at 1,000°C | 8.6 10-6°C | 4.78 10-6°F-1 |
| Thermal conductivity at 1,000°C | 2.35 W.m-1.K-1 |
16.3 BTU |
| Open porosity | 15% | 15% |
| Typical bulk density | 3.45g/cm3 | 215pcf |
Storage
The sintered 30% chrome-alumina, ZIRCHROM HC solution must be stored in a dry environment protected from weather conditions.
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