Low-Impurity Ferroniobium 65% Nb from China
Premium ferroniobium with 65% niobium content, strictly controlled to under 0.015% phosphorus, 0.01% sulfur, and 0.3% silicon for specialty steel applications. Classified under HTS 7202.93.4040 for meeting the exact low phosphorus/sulfur/silicon thresholds for ferroniobium. Essential for pipeline and structural steels requiring superior toughness.
Duty Rate — China → United States
30%
Rate breakdown
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Submit manufacturer's assay reports with each shipment; CBP frequently audits ferroniobium purity claims
• Avoid bulk packaging without liners—moisture can cause surface reactions affecting declared composition
• Label clearly as 'ferroniobium' not 'niobium iron' to prevent misclassification as unwrought alloys