C1221
Coarse grain sintered dense high chrome
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
Typical chemical composition
Typical crystallographic analysis
Main phase: Chromic oxide
Physical characteristics
Description | International standards | British standards |
---|---|---|
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 |
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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