Mullite Powder Refractory Castable

Synthetic mullite-based castable for glass furnace regenerators. HTS 3816.00.20.50 classification for alkali resistance to 1450°C. 3:2 alumina-silica ratio optimizes creep resistance.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3%+35.0%38%
🇲🇽Mexico3%+10.0%13%
🇨🇦Canada3%+10.0%13%
🇩🇪Germany3%+10.0%13%
🇯🇵Japan3%+10.0%13%

Alternative Classifications

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

6902.20Lower: 10% vs 38%

If mullite brick products

Formed articles Chapter 69.

Not sure which classification is right?

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Import Tips & Compliance

XRD analysis confirms mullite phase purity

Creep rate data (<0.5% at temp) essential

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