Magnetic Material Specifications
The five permanent magnet families we manufacture, compared side by side. Every grade datasheet referenced below is available as a PDF in our download library.
Family Comparison at a Glance
Representative values — see grade tables below for exact data.
| Property | NdFeB | SmCo | Ferrite | AlNiCo | Flexible |
|---|---|---|---|---|---|
| Max Energy Product | Grades through N54; see grade-specific (BH)max | 16–32 MGOe | 3–5 MGOe | 1.5–6 MGOe | 0.6–2 MGOe |
| Max Operating Temp | See grade-specific data | See grade-specific data | See grade-specific data | See grade-specific data | See grade-specific data |
| Br Temp Coefficient | -0.11%/°C | -0.03%/°C | -0.18%/°C | -0.02%/°C | -0.19%/°C |
| Coercivity | Very high | High | Medium | Low | Low |
| Corrosion Resistance | Needs coating | Excellent | Excellent | Excellent | Good |
| Machinability | Grinding only | Grinding only | Grinding only | Cast/sintered, grindable | Cuttable, punchable |
| Relative Cost / MGOe | Low | High | Lowest | Medium | Low |
| Typical Use | Motors, sensors, holding | High temp, aerospace | Volume, separators | Meters, high temp | Signage, gaskets, motors |
This page provides selected reference grades only. The full NdFeB directory and SmCo directory retain the complete published tables. Values must be checked against the applicable datasheet and operating conditions before approval.
NdFeB — Selected Grades
35 grade datasheets available. Suffix = maximum operating temperature class.
Select up to four grades to compare the published reference values. Check the full material page and test conditions before design approval.
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| Grade | Br (kGs) | bHc (kOe) | iHc (kOe) | (BH)max (MGOe) | Max Temp | Datasheet |
|---|---|---|---|---|---|---|
| N35 | 11.7–12.1 | ≥10.8 | ≥12 | 33–36 | 80°C | |
| N38M | 12.2–12.6 | ≥11.4 | ≥14 | 36–39 | 100°C | |
| N42SH | 12.8–13.2 | ≥12.0 | ≥20 | 40–43 | 150°C | |
| N45SH | 13.2–13.7 | ≥12.5 | ≥20 | 43–46 | 150°C | |
| N42UH | 12.8–13.2 | ≥12.0 | ≥25 | 40–43 | 180°C | |
| N35EH | 11.7–12.1 | ≥10.8 | ≥30 | 33–36 | 200°C | |
| N35TH | 11.7–12.1 | ≥10.8 | ≥32 | 33–36 | 220°C | |
| N52H | 14.1–14.5 | ≥13.5 | ≥17 | 50–53 | 120°C | |
| N54SH | 14.4–14.8 | ≥13.8 | ≥20 | 52–55 | 150°C |
SmCo — Selected Grades
1:5 and 2:17 series. 12 grade datasheets available.
Select up to four grades to compare the published reference values. Check the full material page and test conditions before design approval.
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Ferrite
A ceramic family for cost-sensitive magnetic designs.
SELECTION GUIDEMaterial notes and downloadsExplore applications and requirements
Ferrite (Ceramic)
Y30 / C8 class: Br 3.8–4.2 kGs, (BH)max 3.5–4.5 MGOe, usable to 250°C. Immune to corrosion and demagnetization by vibration. The workhorse for cost-driven, high-volume applications.
AlNiCo
Thermal stability with magnetic-circuit requirements reviewed.
SELECTION GUIDEMaterial notes and downloadsExplore applications and requirements
AlNiCo
Cast and sintered. Br up to 12.5 kGs with excellent temperature stability (-0.02%/°C) to 450°C+. Low coercivity — must be magnetized in-circuit or with a keeper. Classic choice for instruments and sensors.
Flexible Magnets
Sheets, strips and converted magnetic parts.
SELECTION GUIDEMaterial notes and downloadsExplore applications and requirements
Flexible (Rubber)
Isotropic (0.6–0.8 MGOe) and anisotropic (1.4–2.2 MGOe) sheet and strip, 0.3–3 mm thick. Punchable, cuttable, and printable with vinyl or adhesive backing. Ideal for signage, gaskets, and small motors.
Not Sure Which Grade Fits?
Tell us the force, temperature, and environment — we recommend the most cost-effective grade with margin calculated for your geometry.