High Alumina Castable Refractory Cement
A dry-mix refractory cement composed primarily of high-alumina aggregates and calcium aluminate binder, designed for casting into custom shapes that withstand temperatures up to 1800°C. It falls under HTS 3816.00.20.50 as a refractory cement other than those of heading 3801, used in furnaces and kilns for its heat-resistant properties. When mixed with water, it forms a pourable concrete-like material for repairing or lining high-temperature equipment.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If designed specifically as dolomite ramming mix
Dolomite-based ramming mixes for coreless induction furnaces are separately classified in 3816.00.10.00, distinct from other refractory compositions.
If imported as unprepared cement clinkers or basic Portland cement aggregates
Unmixed clinkers or cements not formulated as refractory compositions fall under Chapter 25 as cement clinkers, lacking specialized binders.
If pre-formed into finished refractory bricks rather than dry-mix powder
Once shaped and fired into articles like bricks, they shift to Chapter 69 as manufactured refractory products, not loose compositions.
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Import Tips & Compliance
• Verify chemical composition meets refractory standards (min. 45% alumina) with lab test certificates to avoid misclassification as basic cement
• Include safety data sheets (SDS) for binders and aggregates; ensure packaging labels specify 'refractory use only' to comply with HAZMAT rules
Related Products under HTS 3816.00.20.50
Magnesia Ramming Refractory Mortar
A granular refractory mortar made from dead-burned magnesia and phosphate binders for repairing steel ladle linings. It qualifies for HTS 3816.00.20.50 as an 'other' refractory composition, offering superior slag resistance in steelmaking at temperatures exceeding 1600°C. Applied by pneumatic ramming for quick hot repairs.
Basic Refractory Gunning Concrete
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Alumina-Silicate Patch Refractory Mortar
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Dolomite-Lime Refractory Ramming Mix
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Silicon Carbide Refractory Castable
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Andalusite-Based Refractory Gun Mix
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