What Is N35EH?
N35EH is specified where operating conditions push beyond what any other NdFeB family can handle — 200°C continuous, with very high margin against demagnetization. Applications include aerospace actuators, downhole oil-and-gas tools, and defense systems.
N35EH Technical Specifications
| Remanence (Br) | 11.7–12.1 kGs (1.17–1.21 T) |
| Coercive Force (HcB) | ≥10.9 kOe (≥867 kA/m) |
| Intrinsic Coercivity (HcJ) | ≥30 kOe (≥2388 kA/m) |
| Energy Product (BHmax) | 33–36 MGOe (263–287 kJ/m³) |
| Max Operating Temperature | 200°C |
| Temperature Coefficient (Br) | -0.12 %/°C |
| Temperature Coefficient (HcJ) | -0.45 %/°C |
| Density (typical) | 7.5 g/cm³ |
| Vickers Hardness (typical) | 550–650 HV |
Values per IEC 60404-5 / GB/T 13560. Actual production values fall within the range quoted; batch-specific BH-curve data is provided on every certificate of conformance.
Where N35EH Is Used
N35EH is specified across the following application categories. Each links to a full application brief with design requirements and recommended grade combinations.
Recommended Coatings for N35EH
Coating choice is driven by operating environment and assembly method. For N35EH, the typical options are:
- •NiCuNi
- •Epoxy over NiCuNi
- •Parylene
See our NdFeB Coatings Guide for a full comparison with salt spray data and decision framework.
Design Considerations When Specifying N35EH
- 01Export controls apply rigorously — some defense applications will be denied licensing.
- 02Heavy rare earth content is at the practical maximum — pricing volatility is unavoidable.
- 03SmCo is sometimes a better material choice above 200°C — evaluate alongside NdFeB.
Related Grades
Frequently Asked Questions
What is N35EH NdFeB magnet?
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N35EH is specified where operating conditions push beyond what any other NdFeB family can handle — 200°C continuous, with very high margin against demagnetization. Applications include aerospace actuators, downhole oil-and-gas tools, and defense systems.
What is the maximum operating temperature of N35EH?
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N35EH sintered NdFeB is rated for continuous operation up to 200°C. This is the practical upper limit before thermal demagnetization begins to affect performance. For a safety margin, design for a working temperature at least 20–30°C below the maximum rating.
What is the BHmax of N35EH?
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N35EH delivers an energy product (BHmax) in the range of 33–36 MGOe (263–287 kJ/m³). This is the maximum magnetic energy density the grade can produce, measured according to standard IEC 60404-5 magnetic testing.
What applications use N35EH magnets?
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N35EH is typically specified for Aerospace & Defense. The grade's combination of 33–36 MGOe (263–287 kJ/m³) energy product and 200°C maximum service temperature determines its fit for any given motor or actuator design.
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