Chromite Mullite Composite Refractories

Composite shapes blending chromite and mullite for glass tank regenerator checkerwork. Under HTS 6815.91.00 primarily for chromite component. High thermal cycling resistance.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳ChinaFree+35.0%35%
🇲🇽MexicoFree+10.0%10%
🇨🇦CanadaFree+10.0%10%
🇩🇪GermanyFree+10.0%10%
🇯🇵JapanFree+10.0%10%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

6815Same rate: 35%

If alumina-mullite without chromite

Alumina-dominant compositions separate.

Not sure which classification is right?

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Import Tips & Compliance

Specify chromite >30% for 6815.91 qualification

Glass tank documentation differentiates use

Thermal expansion data supports classification

Related Products under HTS 6815.91.00

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High-temperature resistant bricks primarily composed of magnesite, used in lining industrial furnaces and kilns. They fall under HTS 6815.91.00 due to their magnesite content and classification as articles of mineral substances not elsewhere specified. These bricks provide thermal insulation and corrosion resistance in steelmaking and glass production.

Dolomite Ramming Mass for Induction Furnaces

Dead-burned dolomite powder mixed for ramming into furnace linings, containing dolime for high-heat applications. Falls under HTS 6815.91.00 as an article containing dolomite in dolime form. Used in steel foundries for lining induction furnaces.

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Dolime-Based Heat Insulation Boards

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Periclase Furnace Roof Tiles

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Magnesite Ladle Nozzle Inserts

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