Float Zone Crystal Grower Backup Roll from Mexico
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 — Mexico → United States
10%
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
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