Cast Niobium Billets Superconductor Grade from Japan
Cylindrical cast billets of superconductor-grade niobium, unwrought for extrusion into wires. HTS 8112.92.4000 covers this pure columbium form, RRR >300 for radiofrequency cavities. Diameter 150-250mm typical.
Duty Rate — Japan → United States
4.9%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Include Residual Resistivity Ratio (RRR) test results in documentation
• Specify accelerator/nuclear end-use for licensing consideration
• Avoid misclassification as 8112.93 if partially extruded