Sapphire Ingot for Optical Window Substrates from China
Czochralski-grown synthetic sapphire (aluminum oxide) ingot weighing more than 2.5 grams, used for laser windows and scratch-resistant displays. HTS 3824.99.1100 applies to cultured crystal ingots excluding Chapter 90 optical elements. Sapphire's extreme hardness (9 Mohs) makes it ideal for aerospace and military optics.
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
• Include boule diameter/length measurements proving >2.5g weight threshold for 3824.99.1100 subheading
• Distinguish from Chapter 69 ceramic articles by providing single-crystal X-ray diffraction certification