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.

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.

Chemical and physical properties

Microstructure

Image
C1221 microstructure

Typical chemical composition

 

Typical crystallographic analysis

Main phase: Chromic oxide

Physical characteristics

DescriptionInternational standardsBritish standards
Cold crushing strength166Mpa24,076psi
Coefficient of thermal expansion7.4 10-6K-14.1 10-6°F-1
Thermal shock resistancemediummedium
Thermal conductivity at 1,000°C2.6 W.m-1.K-118.0 BTU
in hr-1ft-2°F-1
Open porosity16%16%
Typical bulk density4.16g/cm3260pcf

Storage

The scarse grain sintered dense high chrome, C1221 solution must be stored in a dry environment protected from weather conditions.

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