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6902.90.50/Mullite Refractory Brick/Japan

Mullite Refractory Brick from Japan

Mullite refractory bricks, synthesized from kaolin and fired, used in aluminum smelters for creep resistance at 1600°C+. Excellent for reducing atmospheres. Classed HTS 6902.90.50 other refractories.

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

• Chemical analysis must show mullite phase formation post-firing

• Declare for metallurgical end-use to avoid lab ware confusion

Mullite Refractory Brick from Japan — Import Duty Rate | HTS 6902.90.50