High-Purity Ferroniobium 60% Niobium
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing 0.02% or more phosphorus or sulfur, or 0.4% or more silicon
Higher impurity levels in P, S, or Si move classification to the residual ferroniobium category excluding the low-impurity specification.
If imported as pure niobium oxide rather than ferroalloy
Niobium in oxide form (not alloyed with iron) falls under inorganic chemicals in Chapter 28, not ferroalloys.
If classified as ferrosilicon zirconium instead of ferroniobium
Different primary alloying element (zirconium vs niobium) changes the specific ferroalloy heading within Chapter 72.
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Import Tips & Compliance
• 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
Related Products under HTS 7202.93.40.00
Premium Grade Ferroniobium FeNb65
FeNb65 ferroniobium grade with niobium 65±1.5%, P max 0.018%, S max 0.015%, Si max 0.35%, supplied as 10-60mm lumps. Precisely fits HTS 7202.93.4040 low-impurity ferroniobium specification per chapter definitions. Key additive for weldable structural steels.
Low-Impurity Ferroniobium 65% Nb
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.
Ferroniobium Lumps Ultra-Low P/S
Lump-form ferroniobium with maximum 0.01% phosphorus and sulfur, 0.25% silicon, containing 60-70% niobium for electric arc furnace steelmaking. This matches HTS 7202.93.4040 criteria for low-impurity ferroniobium ferroalloys. Used in automotive and aerospace steel alloys.
HSLA Steel Ferroniobium Additive
Specialty ferroniobium optimized for HSLA steels, <0.01% P/S, 0.2% Si max, 68% Nb content in crushed 3-10mm size. Classified HTS 7202.93.4040 due to compliance with low phosphorus/sulfur/silicon limits for ferroniobium. Enhances strength-to-weight ratio in steel.