What Is Rhenium? Uses, Supply & Price Guide

• What is rhenium — one of the rarest, densest metals in Earth’s crust
• Melting point of 3,186°C, second-highest of any element
• Chile the top producer in 2025, followed by China and Poland
• Roughly 80% of output used in jet engine superalloys
• Recovered only as a byproduct of copper-molybdenum mining
• 2025 metal price averaged $2,600 per kilogram, up 90% year on year
• No viable substitute exists for turbine blade alloys

What is rhenium? It is a dense, silvery-grey transition metal, chemical symbol Re, that ranks among the rarest elements in the Earth’s crust — occurring at an average concentration of roughly 1 part per billion. Despite that scarcity, rhenium has become one of the most closely watched technology metals in the aerospace and defence supply chain, prized for a combination of physical properties no other element quite matches.

What Is Rhenium? Properties and Characteristics

Rhenium sits in group 7 of the periodic table alongside manganese and technetium, and belongs to the same refractory metal family CMN tracks closely, including molybdenum, tungsten, tantalum, and niobium. It has a melting point of 3,186°C — second only to tungsten among all elements — and the highest boiling point of any element at roughly 5,630°C. At 21.0 g/cm³ it is also one of the densest metals known, behind only platinum, iridium, and osmium. Rhenium can take on oxidation states ranging from −3 to +7, giving it an unusually wide compound chemistry, and it resists corrosion from most acids at room temperature. It was formally identified and named in 1925 by German chemists Walter Noddack, Ida Noddack, and Otto Berg, who traced its name to the river Rhine.

What Is Rhenium Used For?

The dominant answer to what is rhenium used for is jet engines. According to USGS data, roughly 80% of rhenium consumption goes into nickel-based superalloys used in turbine blades, combustion chambers, and exhaust components for military and commercial aircraft engines — alloys typically containing 3% or 6% rhenium by weight, depending on the generation of the alloy. A further 15% goes into bimetallic platinum-rhenium catalysts, which refineries use to produce high-octane, lead-free gasoline through catalytic reforming. The remainder covers electrical contacts, X-ray targets, thermocouples rated to temperatures above 2,000°C, and mass spectrometer filaments. USGS also notes a growing medical application: several molybdenum-rhenium devices have recently received FDA approval, adding implants to rhenium’s demand base alongside aerospace and refining.

Where Is Rhenium Produced?

Rhenium has no dedicated ore body of its own. It is recovered almost entirely as a byproduct of roasting molybdenum concentrates from copper-molybdenum porphyry deposits — the same ore system that produces molybdenum. That link matters commercially: rhenium supply rises and falls with copper and molybdenum production decisions, not with rhenium demand itself.

Chile’s output, recovered largely from Codelco’s copper-molybdenum operations, made it the leading rhenium producer in 2025 at roughly 37% of world supply, according to USGS Mineral Commodity Summaries 2026. Total world mine production rose only 1% year on year, underlining how tightly rhenium output is bound to copper and molybdenum project economics rather than aerospace demand.

Rhenium Price and Market

USGS reported the 2025 average annual price for 99.99%-pure rhenium metal at $2,600 per kilogram, a 90% increase on 2024, with catalytic-grade ammonium perrhenate up 78% to $2,300 per kilogram over the same period. Both increases reflect tight byproduct supply set against steady aerospace and defence demand. Because rhenium is only ever a secondary output of copper-molybdenum mining, prices can move sharply on production decisions elsewhere in the supply chain rather than on rhenium-specific news. For current spot and benchmark pricing, see CMN’s rhenium price page, updated monthly against SMM data.

Rhenium Supply Chain Risks

Rhenium was added back to the US Final 2025 List of Critical Minerals, published in the Federal Register on 7 November 2025, reflecting several compounding risks. First, byproduct dependency: rhenium has no standalone mine anywhere in the world, so a slowdown in copper or molybdenum output — whatever the reason — cuts rhenium supply automatically. Second, geographic concentration: Chile, China, and Poland together accounted for the large majority of 2025 mine production, leaving the aerospace sector exposed to disruption in a small number of jurisdictions. Third, limited substitution: USGS notes that iridium-tin catalysts have achieved some commercial substitution in petroleum reforming, and materials such as gallium, germanium, and tungsten are being evaluated for other rhenium applications, but no substitute currently matches rhenium’s performance in high-temperature turbine superalloys. Recycling offers some relief — USGS estimates 20,000–25,000 kilograms of secondary rhenium was recovered globally in 2025 from superalloy scrap and spent catalysts — though industry sources say recyclers need prices consistently above $3,000 per kilogram to make hydrometallurgical recovery economically attractive. The minor metals trading community, represented by bodies such as the Minor Metals Trade Association, tracks these dynamics closely given rhenium’s outsized strategic importance relative to its tiny traded volume. For broader context on how rhenium fits into this month’s critical minerals market, see CMN’s August 2026 market analysis.

This article is for informational purposes only.