Float Zone Crystal Furnace Heat Exchanger from China
RF-heated zone furnace heat exchanger for float zone purification of silicon rods into monocrystalline material for wafer production. HTS 8419.90.30.00 covers it as part of heat exchange units in high-temperature semiconductor crystal processing machinery. Manages radiative and convective heat for impurity segregation.
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
• Provide float zone process validation data and thermal modeling; comply with EAR/ITAR if high-purity specs exceed commercial thresholds
• Pitfall: generic 'furnace part' descriptions lead to 8514 misclassification