High-Purity Boron Lump from China
High-purity boron lumps are irregular chunks of elemental boron (>99.9% pure), used in vacuum arc melting for advanced alloys. Falls under HTS 2804.50.0010 as unprocessed boron nonmetal, per Chapter 28 exclusions for worked or alloyed forms.
Duty Rate — China → United States
25%
Rate breakdown
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)
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Submit third-party assay reports for purity to prevent reclassification as scrap or alloy
• Package in inert atmosphere to prevent oxidation; document for customs inspection
• Avoid bulk shipments without proper segregation from oxidizers