Vacuum-Compatible Alloy Steel Balls for Float Zone Crystal Growers from Mexico
Specially alloyed steel balls for vacuum-rated bearings in float zone crystal growers producing ultra-pure silicon for power semiconductors. Low outgassing materials prevent contamination during high-temperature zone refining. Classified as alloy steel balls under HTS 8482.91.0010.
Duty Rate — Mexico → United States
14.4%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Document vacuum certification (e.g
• <10^-8 Torr outgassing) and cleanroom packaging requirements
• Use 'semiconductor crystal grower parts' on commercial invoice for proper statistical reporting
• Avoid generic 'bearing balls' descriptions to prevent misclassification as automotive/general use