Comparisons
NdFeB vs SmCo: temperature, corrosion, cost
Compare NdFeB and SmCo magnets for temperature stability, corrosion behavior, and sourcing trade-offs.
Last updated on 2026/01/24
Temperature stability
- NdFeB offers very high strength but lower temperature stability.
- SmCo is often chosen for higher temperature environments.
Corrosion behavior
- NdFeB typically requires a coating.
- SmCo is more corrosion resistant in many environments.
Cost and availability
- NdFeB is generally lower cost and widely available.
- SmCo can be more expensive and lead times may vary.
When to choose NdFeB
- High strength requirements in compact designs.
- Indoor or controlled environments.
- Cost-sensitive applications with coating options.
When to choose SmCo
- High-temperature or harsh environments.
- Long-term stability needs.
- Applications where corrosion resistance is critical.
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