Low-Impurity Ferroniobium 65% Nb from Japan
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 — Japan → United States
5%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
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