Technical Data
N42SH Technical Specifications
| Parameter | Value |
|---|---|
| Remanence (Br) at 20°C | 12.9–13.3 kGs (1.29–1.33 T) |
| Coercive Force (HcB) at 20°C | ≥11.9 kOe (≥947 kA/m) |
| Intrinsic Coercivity (HcJ) at 20°C | ≥20 kOe (≥1592 kA/m) |
| Energy Product (BHmax) at 20°C | 40–43 MGOe (318–342 kJ/m³) |
| Nominal temperature class | 150°C |
| Approximate coefficient (Br) | -0.12 %/°C |
| Approximate coefficient (HcJ) | -0.50 %/°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 N42SH?
N42SH is a sintered NdFeB grade in the Super High Temperature (SH) family. This reference lists 12.9–13.3 kGs (1.29–1.33 T) remanence and ≥20 kOe (≥1592 kA/m) intrinsic coercivity at 20°C. The numeric grade describes energy product; the SH 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.
EV Motors
NdFeB magnet design inputs for permanent-magnet traction motors, auxiliary drives and e-axles.
Robotics
NdFeB design inputs for robot joint motors, compact actuators and servo drives.
Industrial Automation
NdFeB magnets for stepper motors, servo drives, linear actuators, magnetic couplings, and factory automation equipment across European and North American manufacturing.
Wind Turbines
NdFeB block and tile design inputs for permanent-magnet wind generators.
Surface Protection
Coating candidates for N42SH
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 N42SH
Key insight
The 150°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
N42UH (180°C)
Lower nominal temperature class
N42H (120°C)
Same family · Super High Temperature (SH)
N38SH · 36–39 MGOe (287–310 kJ/m³)
Same family · Super High Temperature (SH)
N45SH · 43–46 MGOe (342–366 kJ/m³)
Same family · Super High Temperature (SH)
N48SH · 45–48 MGOe (358–382 kJ/m³)
FAQ
Frequently Asked Questions
What is N42SH NdFeB magnet?
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N42SH is a sintered NdFeB grade in the Super High Temperature (SH) family. This reference lists 12.9–13.3 kGs (1.29–1.33 T) remanence and ≥20 kOe (≥1592 kA/m) intrinsic coercivity at 20°C. The numeric grade describes energy product; the SH designation does not identify alloy composition or establish a safe operating point.
What is the maximum operating temperature of N42SH?
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N42SH has a nominal 150°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 N42SH?
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N42SH has a reference BHmax range of 40–43 MGOe (318–342 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 N42SH magnets?
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Related design topics include EV Motors, Robotics, Industrial Automation, Wind Turbines. 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 N42SH
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.