Samarium-Cobalt Magnets: A Critical Material Under the New DFARS Rules
- Dennis Blacksmith
- 3 days ago
- 2 min read
Updated: 2 days ago
By Dennis Blacksmith
Samarium-cobalt magnets are one of the two types of rare earth magnets specifically covered by the new DFARS 252.225-7052 requirements taking effect in 2027.
These high-temperature, high-performance magnets are essential in many defense applications where reliability under extreme conditions is critical. Unlike neodymium magnets, samarium-cobalt magnets maintain their magnetic properties at much higher temperatures, making them ideal for aerospace, naval, and weapons systems that operate in harsh environments.
You’ll find samarium-cobalt magnets in precision guidance systems, electric motors and actuators, radar and sensor components, and various other systems that require stable performance under heat and stress. Their unique properties make them difficult to replace in certain military applications, which is why secure sourcing is particularly important.
China currently dominates much of the global supply chain for rare earth magnets, including samarium-cobalt. The new DFARS rules require full traceability for these magnets when used in defense end items, from raw material sourcing through final magnet manufacturing.
For defense contractors and suppliers, even small samarium-cobalt magnets in commercial components can trigger compliance requirements once integrated into a defense system.
This creates a significant documentation and supplier outreach burden that many companies are only beginning to address.
The challenge is compounded by the fact that supplier cooperation varies widely. Some manufacturers can provide detailed origin information, while others struggle to trace materials through multiple tiers of their supply chain. This is where a structured compliance approach becomes essential.
At RavenClear, we help companies understand their exposure to samarium-cobalt and other critical materials and develop practical compliance strategies that meet current requirements while preparing for future expansion of these rules.
By taking a proactive approach to these requirements, defense contractors can reduce risk, avoid delivery delays, and maintain strong competitive positioning in an increasingly regulated environment.
