Chrome-Magnesite Checker Bricks
Perforated checker bricks with >50% Cr2O3 and MgO for regenerative heat recovery in glass and metallurgical furnaces. The lattice structure maximizes heat exchange efficiency. Classified HTS 6902.10.50.00 as refractory bricks of specified oxide composition.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing >7% free silica
Silica-rich refractories have separate siliceous classification.
If fused cast refractory blocks
Fused rather than fired ceramics classify as glass products in Chapter 70.
If containing >50% graphite
Carbon/graphite dominant articles excluded to Chapter 68.
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Import Tips & Compliance
• Specify 'checker' design in documentation to distinguish from solid bricks
• Monitor hex chrome content for REACH compliance in addition to US EPA rules
• Import in bulk pallets, not retail packaging, to maintain industrial classification
Related Products under HTS 6902.10.50.00
Magnesia-Herringbone Refractory Bricks
Herringbone-patterned magnesia bricks with >50% MgO for improved gas flow in tunnel kilns and reheating furnaces. The angled design prevents brick movement under thermal cycling. HTS 6902.10.50.00 classification for magnesium refractory bricks.
Rebonded Fused Magnesia Chrome Bricks
Ultra-high purity bricks made from rebonded fused magnesia-chrome grains with aggregate >50% MgO/Cr2O3, for electric arc furnace roofs. Exceptional service life in severe conditions. Covered by HTS 6902.10.50.00 as premium refractory bricks.
High Purity Magnesia Refractory Shapes
Custom-shaped refractory components with 95%+ MgO content for specialized furnace zones like ladle impact pads. Precision fired to maintain dimensional stability. HTS 6902.10.50.00 for high magnesium oxide refractory goods.
Calcium Ferrite Refractory Bricks
Refractory bricks incorporating calcium ferrite phases with >50% CaO equivalent for waste incinerator linings. Resistant to alkali corrosion from flue gases. Classifies HTS 6902.10.50.00 for high calcium oxide refractories.
Magnesia-Dolomite Composite Refractory Blocks
Composite blocks blending magnesia and dead-burned dolomite achieving >50% combined MgO/CaO for basic oxygen furnace linings. Balanced chemistry for steelmaking slags. HTS 6902.10.50.00 classification applies.
Chromium-Corundum Refractory Bricks
High-chrome corundum bricks with Cr2O3>50% for glass furnace superstructures resisting batch carryover. Dense microstructure prevents glass penetration. Covered by HTS 6902.10.50.00 for chromium oxide dominant refractories.