High-Alumina Refractory Firebrick from China
A refractory brick composed of over 50% alumina (Al2O3), fired after shaping to withstand extreme temperatures above 1700°C. Used primarily in industrial furnaces and kilns for lining to protect against molten metal and slag corrosion. Falls under HTS 6902.20.50.10 as a refractory ceramic constructional good containing predominantly alumina.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Provide chemical composition certificates confirming >50% Al2O3 content and firing temperature records to verify refractory classification
• Ensure documentation distinguishes from non-refractory ceramics (Chapter 69 notes exclude unfired or low-temp heated articles)
• Avoid misclassification as building bricks (6904); specify high-temperature end-use in commercial invoice