Rhenium Substitutes: Alternatives and Trade-offs
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Rhenium can be replaced in some applications and not in others. For platinum-rhenium catalysts, USGS names iridium and tin (commercially successful); gallium, germanium, indium, selenium, silicon, tungsten and vanadium are being evaluated. It names substitutes for 5 applications in all, and the table below gives its wording for each, including where a substitute costs performance or does not exist.
$2,600/kg
rhenium metal, 99.99% pure, average value (gross weight) in 2025 (+91% on 2024)
What is rhenium used for?
- Superalloys for high-temperature turbine engine components: an estimated 80% of end uses; rhenium improves the high-temperature strength of some nickel-base superalloys above 1,000 degrees Celsius
- Petroleum-reforming catalysts: an estimated 15%; bimetallic platinum-rhenium catalysts produce high-octane hydrocarbons for lead-free gasoline
- Other alloys and devices: crucibles, electrical contacts, electromagnets, electron tubes and targets, heating elements, thermocouples and vacuum tubes; several molybdenum-rhenium medical devices were approved by the US Food and Drug Administration
Which materials can replace rhenium?
| Application | Substitute and trade-off |
|---|---|
| Platinum-rhenium catalysts | Iridium and tin (commercially successful); gallium, germanium, indium, selenium, silicon, tungsten and vanadium are being evaluated |
| Coatings on copper X-ray targets | Cobalt and tungsten |
| High-temperature thermocouples | Rhodium and rhodium-iridium |
| Coatings on electrical contacts | Tungsten and platinum-ruthenium |
| Electron emitters | Tungsten and tantalum |
Source: USGS Mineral Commodity Summaries 2026, Rhenium. USGS says substitutes often cost performance or money; the table gives its wording for each application.
Frequently asked questions
What can replace rhenium?
Platinum-rhenium catalysts: iridium and tin (commercially successful); gallium, germanium, indium, selenium, silicon, tungsten and vanadium are being evaluated; Coatings on copper X-ray targets: cobalt and tungsten; High-temperature thermocouples: rhodium and rhodium-iridium.
What is rhenium used for?
Rhenium is used in superalloys for high-temperature turbine engine components, petroleum-reforming catalysts and other alloys and devices. Superalloys for high-temperature turbine engine components: an estimated 80% of end uses; rhenium improves the high-temperature strength of some nickel-base superalloys above 1,000 degrees Celsius.
Can rhenium be recycled?
Nickel-base superalloy scrap and scrapped turbine blades and vanes are recycled hydrometallurgically into rhenium metal for new superalloy melts, and engine revert is generated by an increasing number of companies. Spent rhenium catalysts are recycled in a closed loop. Industry sources estimate global secondary production at 20,000 to 25,000 kilograms in 2025, excluding catalysts.
Is rhenium a critical mineral?
Yes. Rhenium is on the US and Australian critical minerals lists. The United States added rhenium to its list in November 2025, when the final list grew from 50 to 60 minerals. US net import reliance for rhenium in 2025 was 75%.
Sources
Read on October 14, 2026. Figures on this page come from these documents; where a number is an estimate, the source says so.
- USGS Mineral Commodity Summaries 2026: Rhenium. Production, reserves, uses, substitutes, recycling and events
- USGS Mineral Commodity Summaries 2026: introduction (Table 7 and Figures 10A and 10B). Net import reliance, leading producer and price changes for critical minerals
- Federal Register: Final 2025 List of Critical Minerals
- EUR-Lex: Regulation (EU) 2024/1252
- Department of Industry, Science and Resources: Australia’s Critical Minerals List and Strategic Materials List
- Government of Canada: Canada’s critical minerals
- EarthRarest price list. Dealer list price, read October 14, 2026; our sister business
- Molibdenos y Metales (Molymet): management analysis of the financial statements to 31 December 2025, in Spanish
- KGHM Polska Miedź: company profile page
- Almalyk Mining and Metallurgical Complex: news item of 24 April 2025
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