Technical Data
N38H Technical Specifications
| Parameter | Value |
|---|---|
| Remanence (Br) at 20°C | 12.2–12.6 kGs (1.22–1.26 T) |
| Coercive Force (HcB) at 20°C | ≥11.4 kOe (≥907 kA/m) |
| Intrinsic Coercivity (HcJ) at 20°C | ≥17 kOe (≥1353 kA/m) |
| Energy Product (BHmax) at 20°C | 36–39 MGOe (287–310 kJ/m³) |
| Nominal temperature class | 120°C |
| Approximate coefficient (Br) | -0.12 %/°C |
| Approximate coefficient (HcJ) | -0.55 %/°C |
| Density (typical) | 7.5 g/cm³ |
| Vickers Hardness (typical) | 550–650 HV |
Br, HcB, HcJ and BHmax are educational reference values at 20°C. Supplier specifications vary; agree the quoted material and acceptance limits separately. Temperature coefficients are approximate reference values, not a substitute for measured hot curves. Agree any batch measurements and certificate contents in the order specification.
Overview
What Is N38H?
N38H is a sintered NdFeB grade in the High Temperature (H) family. This reference lists 12.2–12.6 kGs (1.22–1.26 T) remanence and ≥17 kOe (≥1353 kA/m) intrinsic coercivity at 20°C. The numeric grade describes energy product; the H designation does not identify alloy composition or establish a safe operating point.
Applications
Related application design topics
These briefs describe design inputs and qualification questions. They do not confirm this grade for a particular application or geometry.
Surface Protection
Coating candidates for N38H
Coating choice is driven by operating environment and assembly method. Qualify the finished coating stack for the actual part:
See our NdFeB Coatings Guide for coating definitions and qualification considerations.
Specifying
Design Considerations When Specifying N38H
Key insight
The 120°C class is a preliminary screening value. Check the actual material's hot demagnetization curves against the load line, opposing field and duty cycle.
Compare
Related Grades
Higher nominal temperature class
N38SH (150°C)
Lower nominal temperature class
N38 (80°C)
Same family · High Temperature (H)
N42H · 40–43 MGOe (318–342 kJ/m³)
Same family · High Temperature (H)
N45H · 43–46 MGOe (342–366 kJ/m³)
Same family · High Temperature (H)
N48H · 45–48 MGOe (358–382 kJ/m³)
Same family · High Temperature (H)
N50H · 47–50 MGOe (374–398 kJ/m³)
FAQ
Frequently Asked Questions
What is N38H NdFeB magnet?
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N38H is a sintered NdFeB grade in the High Temperature (H) family. This reference lists 12.2–12.6 kGs (1.22–1.26 T) remanence and ≥17 kOe (≥1353 kA/m) intrinsic coercivity at 20°C. The numeric grade describes energy product; the H designation does not identify alloy composition or establish a safe operating point.
What is the maximum operating temperature of N38H?
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N38H has a nominal 120°C class in this reference. Nominal temperature classes do not establish a safe operating temperature. Geometry, hot curves, load line, opposing field and duty cycle must be assessed for the actual part.
What is the BHmax of N38H?
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N38H has a reference BHmax range of 36–39 MGOe (287–310 kJ/m³) at 20°C. BHmax is the maximum B × H product on the normal demagnetization curve. It does not specify hot output, surface field or pull force. Supplier acceptance values require a material-specific sheet or test record.
What applications use N38H magnets?
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Related design topics include EV Motors, Industrial Automation. These links are educational examples. Grade suitability requires the actual geometry, hot curves, load line, opposing field and duty cycle; the reference properties alone cannot establish it.
Request a drawing review for N38H
Mainrich’s company range is N30 to N56. Grade, series, geometry and temperature must be confirmed together. Share your drawing, quantity and operating conditions for review.