Technical documentation
How to read a refractory technical data sheet
How to interpret Al₂O₃, SiO₂, density, porosity, CCS, temperature, conductivity, binder, water and installation data in a refractory TDS.
Direct answer
Read a TDS as a system: product identity and class, chemistry, physical properties, temperature limits, thermal data, binder, water, installation, curing, dry-out and test-method notes. One isolated value does not prove suitability for a position.
Chemical and physical properties
Al₂O₃, SiO₂, Fe₂O₃, CaO and other components describe the chemical framework. Bulk density and apparent porosity indicate structure but require product-class context. Cold crushing strength is one mechanical property, not total service resistance.
- chemical composition and reporting basis
- bulk density and apparent porosity
- cold crushing strength
- permanent linear change
- refractoriness or refractoriness under load where stated
Service temperature and thermal conductivity
A maximum or classification temperature is not automatically the continuous recommended temperature. Check the manufacturer definition and test conditions. Thermal conductivity λ changes with temperature, so lining calculations should use λ(T), not one generic value.
Binder, water and installation
For monolithics, look for bond type, water range, grain size, mixing, placement, curing and first heat-up. For bricks, verify shape, tolerances, compatible mortar and masonry method. Undocumented data should be marked for confirmation rather than assumed.
FAQ
Short answers
What does Al₂O₃ mean on a data sheet?
It is the aluminium-oxide content on the stated analysis basis. It supports classification but does not determine every performance characteristic.
Is every catalogue value guaranteed?
Not necessarily. Typical or indicative values differ from contractual guaranteed limits; the current revision and quotation must define the status.
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