3816.00.20.50/Mullite Powder Refractory Castable/Japan

Mullite Powder Refractory Castable from Japan

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.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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Import Tips

• XRD analysis confirms mullite phase purity

• Creep rate data (<0.5% at temp) essential