C1221

Range
Sintered
Subtitle

Coarse grain sintered dense high chrome

Description

Very high corrosion resistance with good thermal-mechanical properties. Uniform and single-phase microstructure enabling low stoning risk.

Chemical and physical properties

Microstructure

Image
C1221 microstructure

Typical chemical composition

 
 

Typical crystallographic analysis

Main phase: Chromic oxide

Physical characteristics

Description International standards British standards
Cold modulus of rupture 30Mpa 4,351psi
Cold crushing strength 166Mpa 24,076psi
Coefficient of thermal expansion 7.4 10-6K-1 4.1 10-6°F-1
Thermal shock resistance medium medium
Thermal conductivity at 1,000°C 2.6 W.m-1.K-1

18.0 BTU
in hr-1ft-2°F-1

Open porosity 16% 16%
Typical bulk density 4.16g/cm3 260pcf

Typical application

C1221 is typically used in high-wear areas. With good thermal-mechanical properties, C1221 is also used in areas subject to high thermal gradient.

  • Reinforcement fiber and textile glass furnaces : throat, flow blocks and doghouse areas.
  • Insulation fiberglass furnaces : throat and other high-wear areas.
  • Sodalime glass furnaces : throat and submerged wall.

The superior corrosion resistance minimize the potential impact on glass coloration.

C1221 is also a potential material for overcoating applications.

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