High-Purity Ferroniobium 60% Niobium from Mexico
Ferroniobium alloy containing approximately 60% niobium by weight, with less than 0.02% phosphorus, less than 0.02% sulfur, and less than 0.4% silicon, used primarily in high-strength low-alloy (HSLA) steel production. This product falls under HTS 7202.93.4040 due to its specific low impurity levels in phosphorus, sulfur, and silicon as defined in the chapter notes for ferroniobium classification. It is supplied in lump form for steelmaking furnaces.
Duty Rate — Mexico → United States
Rate breakdown
Import Tips
• Provide detailed chemical analysis certificates verifying P <0.02%, S <0.02%, and Si <0.4% at entry to avoid reclassification
• Declare exact niobium content and impurity levels; common pitfall is mislabeling standard ferroniobium as high-purity grade
• Use proper packaging to prevent contamination during transit, as rust/discoloration offers no duty allowance per chapter notes