Samarium

Material information

The High-Temperature Magnet Master

Ensuring magnetic performance in the most extreme environments with Less Common Metals.

When a Neodymium magnet gets too hot, it fails. When a Samarium magnet gets too hot, it just keeps working. Samarium is the heavy-duty hero of the permanent magnet world, offering incredible magnetic strength that refuses to degrade even in the searing heat of a jet engine or a high-speed motorsport motor.

As a trusted UK manufacturer of advanced rare earth alloys, Less Common Metals (LCM) is a recognised expert in the highly specialised permanent magnet sector. Located in Ellesmere Port, UK, we supply the premium-grade Samarium alloys that the defence, aerospace and motorsport industries rely on when failure is not an option.

Technical Details

CompositionSamarium Metal 99.9%
Common metallic impuritiesTrace metals basis
Physical DescriptionSilver-grey dendritic lump up to 60mm edge size
AnalyticsICP-OES
Certificate of analysisAvailable upon request
PackagingPacked in sealed polythene bags and supplied in securely sealed metal drums, resistant to the impregnation of water

What is Samarium?

Samarium is a moderately hard, silvery-white rare earth metal that slowly oxidises in air. While it has several niche applications in nuclear reactors and chemical catalysis, its defining industrial purpose is its role in creating some of the most powerful and temperature-resilient permanent magnets on Earth.

What is Samarium used for?

Samarium’s industrial footprint is highly focused and incredibly vital:

  • Samarium-Cobalt (SmCo) Magnets: This is the major commercial application of the element. Samarium is alloyed with Cobalt to create permanent magnets that possess a magnetic strength second only to Neodymium. Crucially, however, SmCo magnets have a significantly higher Curie point (the temperature at which a material loses its magnetism). They can withstand blistering temperatures above 700°C (1,292°F) without losing their magnetic properties.

  • Aerospace & Defence: Because of this extreme temperature resilience, SmCo magnets are the absolute standard for military aviation, satellite propulsion systems, precision guided munitions, and the high-performance electric motors used in aerospace engineering.

  • Specialised Sensors & Instruments: Samarium is utilised in highly precise sensors, microwave applications and acoustic equipment operating in environments where heat would destroy standard magnetic components.

Samarium Industry Insight

The Ultimate Insurance Policy

Samarium-Cobalt magnets are generally more expensive and brittle than Neodymium magnets. However, in the aerospace and defence sectors, cost is secondary to reliability. If a magnet demagnetises mid-flight due to engine heat, the entire system fails. But with Samarium, it provides the ultimate engineering insurance policy. Therefore, making it a highly strategic, mission-critical material for Western defence and advanced manufacturing supply chains.

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