Semiconductor Wafer boule Grinder Roll from China
Precision cast steel roll for crystal grinders that shape semiconductor boules to exact diameters for wafer production. Under HTS 8455.30.0035 as a cast steel rolling mill roll not exceeding 2,268 kg, critical for grinding flats indicating conductivity type. Maintains tight tolerances essential for downstream wafer slicing.
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
• Submit surface finish specs (e.g
• Ra values) proving suitability for semiconductor grinding
• Comply with REACH for steel alloys; test for heavy metals common in casting
• Pair with boule processing equipment docs to prevent standalone part reclassification