About refractory metals
Editorial · sourcedWhat are refractory metals?
"Refractory metals" are defined in materials science as the metals with extremely high melting points (above ~2,000 °C). The standard core set, per ASM Handbook Vol. 2 and the Minerals, Metals & Materials Society (TMS), contains five metals: tungsten (m.p. 3,422 °C — the highest of any element), molybdenum (2,623 °C), tantalum (3,017 °C), niobium (2,477 °C) and rhenium (3,186 °C). Hafnium (2,233 °C) and zirconium (1,855 °C) are commonly included because they share the same metallurgical behaviour and are processed by the same powder-metallurgy techniques. Chromium and vanadium are sometimes classified as "refractory" but are normally treated as strategic-grade ferro-alloys.
How refractory metals are priced
None of the refractory metals has a regulated futures contract on a major exchange. Pricing is by benchmark assessment:
- Tungsten — ammonium paratungstate (APT) FOB China and ferro-tungsten in-warehouse Rotterdam, both assessed by Fastmarkets and Argus.
- Molybdenum — Mo oxide free-market dealer price; LME launched a cash-settled Mo futures in 2010 (low liquidity).
- Tantalum — Ta concentrate (Ta₂O₅ basis), assessed by Fastmarkets and the Tantalum-Niobium International Study Center (T.I.C.).
- Niobium — ferro-niobium 65% in-warehouse Rotterdam / Pittsburgh, assessed by Fastmarkets and Argus.
- Rhenium — ammonium perrhenate (APR), assessed by Fastmarkets and Argus.
- Hafnium & Zirconium — Fastmarkets weekly assessments for Hf 99.9% bar and zircon sand.
Where refractory metals come from
Per USGS MCS 2026: tungsten — China supplies ~80% of world mine output (Jiangxi, Hunan), with Vietnam (Nui Phao), Russia and Austria providing the balance. Molybdenum — China ~40%, USA ~15% (Climax / Henderson, Colorado), Chile ~20% (as a by-product of porphyry copper). Tantalum — DR Congo (artisanal coltan, ~40% of world supply by USGS), Australia (Wodgina, Greenbushes), Brazil. Niobium — Brazil dominates with >90% of world output (Araxá / CBMM; Catalão / Anglo American). Rhenium — Chile (Molymet from Codelco moly concentrates), Poland (KGHM). Hafnium — by-product of nuclear-grade zirconium production, USA (ATI) and France (Framatome). Zirconium — Australia, South Africa, China (zircon-sand heavy-mineral mining).
Who produces refractory metals
Tungsten: China Tungsten & Hightech, Xiamen Tungsten, Almonty Industries (Sangdong, Korea). Molybdenum: Freeport-McMoRan (Climax Molybdenum), Codelco, Molymet (world's largest moly refiner). Tantalum & Niobium: CBMM (Brazil, ~80% of world Nb), Magris Resources / Niobec (Canada), Anglo American (Catalão), Global Advanced Metals (US, primary Ta refiner). Rhenium: Molymet, KGHM. Hafnium / Zirconium: ATI, Framatome, Westinghouse.
What refractory metals are used for
The shared property — extreme heat resistance — defines the application set:
- Tungsten — cemented carbide cutting tools (~50% of demand), incandescent filaments (legacy), armour-piercing kinetic-energy penetrators, X-ray shielding.
- Molybdenum — alloying element in high-strength stainless and low-alloy steels (~75% of demand), Mo-rhenium superalloys, sputtering targets for displays.
- Tantalum — solid-electrolyte capacitors in mobile phones, laptops, hearing aids (~50% of demand); superalloys for jet engines; sputtering targets.
- Niobium — >90% goes into HSLA (high-strength low-alloy) structural steels for pipelines, automotive frames, construction; high-purity Nb-Ti and Nb-Sn alloys for superconducting magnets (MRI, LHC, ITER).
- Rhenium — Ni-Re single-crystal superalloys for jet-engine turbine blades (Pratt & Whitney F135, GE9X, Rolls-Royce Trent XWB).
- Hafnium — nuclear-reactor control rods (high neutron-absorption cross-section), superalloy alloying element.
- Zirconium — nuclear fuel cladding (Zircaloy — Zr has ultra-low neutron absorption, the inverse of Hf), chemical-plant reactor vessels.
Key facts about refractory metals supply
- All seven refractory metals are on the USGS 2025 Critical Minerals list; tungsten, tantalum, niobium and hafnium are also on the EU CRM 2023 list.
- Tungsten is the most concentrated metal market on Earth — China holds ~80% mine output and ~80% of intermediate processing (APT, ferro-tungsten). The EU classifies tungsten as a Strategic Raw Material under the CRM Act.
- Hafnium and zirconium are co-produced in fixed ratio (~1 kg Hf per 50 kg Zr) — Hf supply is bound to nuclear-grade Zr demand.
- Rhenium is produced as a by-product of copper-porphyry molybdenum concentrates — annual world output is <60 t (one of the rarest stably mined elements).