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6902.90.50/Mullite Refractory Brick/Mexico

Mullite Refractory Brick from Mexico

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 — Mexico → United States

10%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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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