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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as pure magnesite without refractory formulation
Natural magnesite in calcined form is under Chapter 25; requires binders to be a refractory composition.
If containing carbon/graphite additives for specific steel applications
Carbon-containing refractory compositions have dedicated subheadings based on material specs.
If sold as pre-cast magnesia refractory blocks
Finished cast shapes are classified as refractory articles in Chapter 69, not dry mixes.
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Import Tips & Compliance
• Include melting point (>1600°C) and slag resistance test reports to confirm refractory status
• Phosphate binders may trigger chemical import regs; prepare EPA notifications if applicable
• Avoid pitfall of bulk misclassification by specifying 'ramming mortar for metallurgical furnaces' on invoices
Related Products under HTS 3816.00.20.50
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