Castable CCS After 1600°C Firing: Compare the Test Condition
Why a cold crushing strength value after high-temperature firing differs from a dry-strength result.
Cold crushing strength, or CCS, is measured after a specimen has followed a stated preparation and heat-treatment sequence. A number marked CCS 1600°C is not a measurement taken while the material is hot; it is generally a cold test after firing to that temperature. The distinction matters when comparing it with strength after drying at 110°C.
Keep the temperature with the number
Write the test temperature, soak conditions if supplied, specimen preparation, and units beside every CCS result. A value in MPa cannot be compared by eye with one in kg/cm². Before using a supplier comparison table, convert units consistently and retain the original reported figure.
Do not infer service life from CCS alone
Crushing strength helps assess material integrity, but a furnace lining may fail by thermal shock, chemical attack, erosion, or anchor movement. Review density and permanent linear change at relevant temperatures and discuss the actual wear mechanism with the supplier.
The Royal LC-98 page presents its strength result with a stated firing temperature so it can be read in context.