Global Commodity Insight · 2026
Samarium Is the High-Temperature Defense-Magnet Rare Earth With a Second Strategic Role in Nuclear Systems
Xin.bz Global Commodity Insight ·
TL;DR
- Samarium's principal strategic use is in samarium-cobalt permanent magnets, which keep performing at temperatures where NdFeB magnets need heavy-REE modification.
- SmCo magnets are especially important in aerospace and defense because they combine thermal stability, corrosion resistance, and magnetic reliability.
- Samarium also absorbs neutrons and is used in nuclear-reactor control and shielding applications.
- China placed samarium metals, alloys, compounds, and oxides under export controls in April 2025.
- USGS identified 60 tonnes of samarium-cobalt alloy as a potential FY2025 U.S. National Defense Stockpile acquisition.
- SMM assessed samarium oxide at $2.17/kg on August 27, 2026.
- Energy Fuels is building U.S. commercial samarium separation capacity for completion by the end of 2028; MP Materials also plans samarium separation at Mountain Pass.
Commodity Deep Dive — part of the Xin.bz Global Commodity Insight series. Browse all: Commodities.
Commodity classification
| Classification | Samarium |
|---|---|
| Rare Earth Element | Yes — Light/Middle Rare Earth |
| Strategic Resource | Critical — Defense & Nuclear |
| Agricultural Industry | None |
| Manufacturing Industry | Primary — samarium-cobalt magnets, optical glass, catalysts, specialized materials. |
| Communications Industry | Material — microwave components, precision electronics, magnets, and optical systems. |
| Defense Industry | Primary — SmCo magnets retain performance at high temperature and resist corrosion. |
| Space Industry | Primary / Material — high-temperature permanent magnets and precision aerospace systems. |
| Hazardous Transport | Moderate — oxide is stable; metal and powders are reactive. |
| Rail Transport | Secondary |
| Sea Transport | Primary |
| Land / Road Transport | Primary |
| Air Transport | Material / Primary for high-value specialty material |
| Market Volatility | High |
| Demand Seasonality | Low |
| Supply Seasonality | Low |
| Top Producer | China |
| Top Consumer | China and the global defense/aerospace magnet industry — country-level samarium consumption is unpublished. |
| Key Port / Chokepoint | Chinese separation and SmCo supply chains — the systemic chokepoints. |
What is it?
Samarium (Sm, atomic number 62) is a rare-earth metal best known for samarium-cobalt permanent magnets.
SmCo magnets preceded NdFeB technology and remain indispensable where high operating temperature, corrosion resistance, and magnetic stability outweigh cost.
How is it made?
Samarium occurs mixed with other rare earths in bastnäsite, monazite, and related minerals.
Processing requires:
ore/concentrate → chemical cracking → mixed rare-earth solution → solvent extraction → samarium oxide → metal → SmCo alloy → sintered magnet
The oxide price is low relative to terbium or dysprosium, but qualified SmCo magnet production is far more specialized than oxide production.
Where is it produced?
China dominates rare-earth mining, separation, and SmCo supply.
Non-Chinese rare-earth feed exists in the United States and Australia, but separated samarium capacity remains limited.
Notable sources & producers
| Source / producer | Strategic significance |
|---|---|
| Chinese rare-earth producers | Dominant global separated samarium supply. |
| MP Materials — Mountain Pass | Plans expanded heavy/mid-REE refining that includes samarium oxide separation. |
| Energy Fuels — White Mesa | Commercial Sm/Eu/Gd circuits planned for completion by end-2028. |
| Iluka — Eneabba | Broad separated-REE refinery under construction in Australia. |
| U.S. SmCo magnet manufacturers | Critical downstream defense capability; the U.S. has historically retained more SmCo magnet manufacturing than NdFeB manufacturing. |
What is it used for?
- samarium-cobalt permanent magnets
- aircraft and missile systems
- guidance and radar components
- high-temperature motors and actuators
- spacecraft mechanisms
- microwave filters
- optical glass
- lasers
- nuclear reactor control and neutron absorption
- specialized medical applications
Why is it important?
SmCo magnets function in high-temperature environments that challenge standard NdFeB magnets.
They also resist corrosion on their own; NdFeB depends on coatings.
That makes samarium strategically important despite its lower commodity price.
Is there a substitute?
NdFeB can replace SmCo in many lower-temperature applications.
Ferrites can replace it where size and magnetic strength are less important.
High-temperature defense and aerospace systems require major redesign before those substitutes are acceptable.
How is it transported?
Samarium oxide and metal travel in drums and sealed containers by road, sea, and air. Finished SmCo magnets are high-value components and commonly move through air freight and controlled industrial logistics.
Transportation risks
Export licensing and qualified magnet supply matter more than port capacity.
A customer can reroute a container of oxide in days. Qualifying a new SmCo magnet producer for a missile, aircraft, or space system takes years.
How long does it store?
Samarium oxide stores for years under dry conditions.
Samarium metal oxidizes and requires controlled packaging. SmCo magnets have excellent corrosion stability and long service/storage life when protected from mechanical damage.
Historical price behavior
| Reference | Price |
|---|---|
| 2017–21 average Sm oxide | about $2.0/kg |
| 2022 spot reference | about $3.3/kg |
| Aug. 27, 2026 Sm oxide | $2.17/kg |
| Aug. 27, 2026 Sm metal | $9.85/kg |
Commodity samarium is relatively inexpensive. The strategic premium appears downstream in cobalt, alloy production, qualification, and magnet manufacturing.
Current Price & Market — August 28, 2026
SMM assessed samarium oxide at $2,101–2,232/tonne, averaging $2,166.69/tonne, or $2.17/kg, on August 27.
Samarium metal averaged $9.85/kg.
The April 2025 Chinese export controls remain the defining trade constraint. Western governments and producers are responding by building separated samarium and SmCo capacity.
Current-price link:
Shanghai Metals Market — Rare Earth Oxides
Strategic risks
- Direct Chinese export controls.
- SmCo magnet qualification is highly specialized.
- Cobalt availability and price affect the downstream magnet.
- Qualified defense and aerospace components take years to redesign.
- U.S. oxide separation remains under development.
- Nuclear applications add a second strategic demand channel.
What can move the market?
Watch Chinese export licensing, defense stockpile acquisitions, SmCo magnet orders, cobalt prices, MP Materials samarium separation, Energy Fuels’ 2028 circuit, aerospace production, and nuclear-sector demand.
Xin.bz bottom line
Samarium separates commodity price from strategic importance.
Its oxide costs only a few dollars per kilogram, yet SmCo magnets operate inside systems where failure is unacceptable and temperature is extreme.
The bottleneck is reliable access to separated samarium, cobalt, alloying expertise, and qualified magnet manufacturing.
Samarium is a defense-critical rare earth whose strategic value sits downstream in high-temperature magnet performance and nuclear functionality.
Sources / market data
- U.S. Geological Survey. Mineral Commodity Summaries 2026 — Rare Earths.
- U.S. Geological Survey. 2025 Critical Minerals List.
- U.S. Department of Energy. Rare Earth Permanent Magnet Supply Chain Assessment.
- Shanghai Metals Market. Samarium Oxide and Samarium Metal Prices. 27 Aug. 2026.
- MP Materials. Materials and heavy-REE expansion disclosures.
- Energy Fuels. Q2 2026 Results and White Mesa Heavy Rare Earth Expansion.
- U.S. Department of Defense / National Defense Stockpile planning materials.
Price note: Samarium oxide, samarium metal, SmCo alloy, and finished qualified magnets represent very different value stages.