Molybdenum Ores and Concentrates (Not Roasted)

Unroasted molybdenum concentrates — the form shipped before calcination converts molybdenite to technical-grade MoO₃ — are a critical upstream input for high-strength steel alloys and specialty chemicals. The single US tariff line (2613900000) captures all unroasted forms, distinguishing them from roasted concentrates classified elsewhere. Peru, Mexico, and Chile are the dominant foreign suppliers, reflecting the Andean and North American copper-porphyry deposits where molybdenum is recovered as a byproduct. Importers should track origin carefully, as supply concentration among a handful of mining jurisdictions creates exposure to export-policy changes.