Resin-Bonded Magnesia Carbon Bricks
High-performance refractory bricks composed of over 70% magnesia (MgO) with carbon content under 30%, chemically bonded using phenolic resin or pitch. These bricks are designed for lining steel ladles and electric arc furnaces to withstand extreme temperatures and slag corrosion. Classified under HTS 6815.99.41.10 due to their specific magnesia-carbon composition and resin/pitch bonding.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If silicate bonded instead of resin/pitch
Silicate-bonded magnesia refractories fall under a separate subheading in 6815.99.
If fired and containing >50% MgO but different carbon/bonding
Fired refractory bricks of magnesite are classified in Chapter 69, not Chapter 68 NES.
If imported as chemical preparations or unfired mixes
Unfired refractory mortars or cements with magnesia are under chemical preparations heading.
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Import Tips & Compliance
• Verify chemical composition certificate showing >70% MgO and <30% carbon content to confirm HTS classification
• Ensure supplier provides bonding agent details (resin or pitch) as documentation for customs; common pitfall is classifying as silicate-bonded
• Comply with refractory material import regs; test for hazardous substances in pitch/resin components
Related Products under HTS 6815.99.41.10
Magnesia Carbon Ladle Nozzle Inserts
Refractory inserts for steel ladle nozzles made with >70% magnesia, 5-25% carbon, and resin-bonded for high thermal shock resistance. Used in continuous casting to control molten steel flow. Falls under HTS 6815.99.41.10 for its precise magnesia-carbon-resin composition not specified elsewhere.
Pitch-Bonded Magnesia Carbon Slide Gate Plates
Slide gate plates for steel ladles featuring >70% MgO, 15% graphite carbon, pitch-bonded for erosion resistance in high-temperature molten metal environments. Essential for precise flow control in steel production. HTS 6815.99.41.10 applies to this resin/pitch-bonded mineral article composition.
Resin-Bonded Magnesia Carbon Ramming Mix
Pre-formed ramming mix articles with >70% magnesia, trace-28% carbon, resin-bonded for repairing furnace linings on-site. Used in steel plants for quick hot repairs. Classified in HTS 6815.99.41.10 as other resin/pitch-bonded magnesia-carbon articles.
Magnesia Carbon Submerged Entry Nozzle Tips
Replaceable tips for submerged entry nozzles in continuous casting, made with 75% MgO, 20% carbon, pitch-bonded for steel-slag resistance. Critical for billet quality. HTS 6815.99.41.10 covers these specific chemically bonded mineral compositions.
Phenolic Resin Magnesia-Graphite Bricks
Phenolic resin-bonded bricks with 72% MgO and 18% graphite for BOF vessel linings, offering superior spalling resistance. Used in basic oxygen furnaces. Meets HTS 6815.99.41.10 criteria for >70% magnesia, <30% carbon, resin-bonded.
Magnesia Carbon Delta Shaped Inserts
Delta-shaped refractory inserts for ladle shrouds, 78% MgO, 12% carbon, resin-bonded for argon purging systems in steelmaking. Ensures gas distribution without clogging. HTS 6815.99.41.10 for this bonded mineral article.