ZIRCHROM HC

Range
Sintered
Subtitle

Sintered 30% chrome-alumina

Description

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
in hr-1ft-2°F-1

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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