Technical Data
N42 Technical Specifications
| Parameter | Value |
|---|---|
| Remanence (Br) at 20°C | 12.9–13.2 kGs (1.29–1.32 T) |
| Coercive Force (HcB) at 20°C | ≥11.8 kOe (≥939 kA/m) |
| Intrinsic Coercivity (HcJ) at 20°C | ≥12 kOe (≥955 kA/m) |
| Energy Product (BHmax) at 20°C | 40–43 MGOe (318–342 kJ/m³) |
| Nominal temperature class | 80°C |
| Approximate coefficient (Br) | -0.12 %/°C |
| Approximate coefficient (HcJ) | -0.60 %/°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 N42?
N42 is a sintered NdFeB grade in the Standard family. This reference lists 12.9–13.2 kGs (1.29–1.32 T) remanence and ≥12 kOe (≥955 kA/m) intrinsic coercivity at 20°C. The numeric grade describes energy product; the standard N 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.
Industrial Automation
NdFeB magnets for stepper motors, servo drives, linear actuators, magnetic couplings, and factory automation equipment across European and North American manufacturing.
Medical Devices
NdFeB design considerations for medical equipment mechanisms, sensors and permanent-magnet MRI systems.
Surface Protection
Coating candidates for N42
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 N42
Key insight
The 80°C class is a preliminary screening value. Check the actual material's hot demagnetization curves against the load line, opposing field and duty cycle.
FAQ
Frequently Asked Questions
What is N42 NdFeB magnet?
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N42 is a sintered NdFeB grade in the Standard family. This reference lists 12.9–13.2 kGs (1.29–1.32 T) remanence and ≥12 kOe (≥955 kA/m) intrinsic coercivity at 20°C. The numeric grade describes energy product; the standard N designation does not identify alloy composition or establish a safe operating point.
What is the maximum operating temperature of N42?
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N42 has a nominal 80°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 N42?
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N42 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 N42 magnets?
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Related design topics include Industrial Automation, Medical Devices. 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 N42
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.