Float Zone Crystal Grower Backup Roll from China
Cast steel backup roll for float zone crystal growers used to produce high-purity silicon ingots for semiconductor wafers. Classified under HTS 8455.30.0035 due to its role in supporting material flow in rolling mill-like processes for monocrystalline semiconductor production, with weight under 2,268 kg. Ensures stability during zone refining without introducing impurities.
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
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 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(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Import Tips
• Include float zone process diagrams in documentation to justify rolling mill classification
• Check for anti-dumping duties on steel rolls; obtain origin certificates early
• Avoid mislabeling as general machinery parts, which triggers different valuation methods