Neodymium Magnet Specification:
| Material Type | Residual Flux Density (Br) |
Coercive Force (Hc) |
Intrinsic Coercive Force (Hci) | Max.Energy Product (BH)max |
| N35 | 11.7-12.1 KGs | >11.0 KOe | >12 KOe | 33-35 MGOe |
| N38 | 12.2-12.6 KGs | >11.0 KOe | >12 KOe | 36-38 MGOe |
| N40 | 12.6-12.9 KGs | >11.0 KOe | >12 KOe | 38-40 MGOe |
| N42 | 13.0-13.2 KGs | >11.0 KOe | >12 KOe | 40-42 MGOe |
| N45 | 13.3-13.7 KGs | >11.0 KOe | >12 KOe | 43-45 MGOe |
| N48 | 13.8-14.2 KGs | >11.0 KOe | >12 KOe | 45-48 MGOe |
| N50 | 14.1-14.5 KGs | >11.0 KOe | >11 KOe | 48-50 MGOe |
| N52 | 14.5-14.8 KGs | >11.2 KOe | >11 KOe | 49.5-52 MGOe |
| N35M | 11.7-12.1 KGs | >11.4 KOe | >14 KOe | 33-35 MGOe |
| N38M | 12.2-12.6 KGs | >11.4 KOe | >14 KOe | 36-38 MGOe |
| N40M | 12.6-12.9 KGs | >11.4 KOe | >14 KOe | 38-40 MGOe |
| N42M | 13.0-13.3 KGs | >11.4 KOe | >14 KOe | 40-42 MGOe |
| N45M | 13.3-13.7 KGs | >11.4 KOe | >14 KOe | 42-45 MGOe |
| N48M | 13.6-14.2 KGs | >11.4 KOe | >14 KOe | 45-48 MGOe |
| N50M | 14.1-14.5 KGs | >11.4 KOe | >14 KOe | 48-50 MGOe |
| N33H | 11.4-11.7 KGs | >10.3 KOe | >17 KOe | 31-33 MGOe |
| N35H | 11.7-12.1 KGs | >10.8 KOe | >17 KOe | 33-35 MGOe |
| N38H | 12.2-12.6 KGs | >11.4 KOe | >17 KOe | 36-38 MGOe |
| N40H | 12.6-12.9 KGs | >11.4 KOe | >17 KOe | 38-40 MGOe |
| N42H | 13.0-13.3 KGs | >11.4 KOe | >17 KOe | 40-42 MGOe |
| N45H | 13.3-13.7 KGs | >11.4 KOe | >17 KOe | 42-45 MGOe |
| N48H | 13.6-14.2 KGs | >11.4 KOe | >16 KOe | 45-48 MGOe |
| N30SH | 10.8-11.2 KGs | >10.1 KOe | >20 KOe | 28-30 MGOe |
| N33SH | 11.4-11.7 KGs | >10.3 KOe | >20 KOe | 31-33 MGOe |
| N35SH | 11.7-12.1 KGs | >10.8 KOe | >20 KOe | 33-35 MGOe |
| N38SH | 12.2-12.6 KGs | >11.4 KOe | >20 KOe | 36-38 MGOe |
| N40SH | 12.6-12.9 KGs | >11.4 KOe | >20 KOe | 38-40 MGOe |
| N42SH | 13.0-13.3 KGs | >11.4 KOe | >20 KOe | 40-42 MGOe |
| N45SH | 13.3-13.7 KGs | >11.4 KOe | >19 KOe | 43-45 MGOe |
| N28UH | 10.4-10.8 KGs | >9.8 KOe | >25 KOe | 26-28 MGOe |
| N30UH | 10.8-11.2 KGs | >10.1 KOe | >25 KOe | 28-30 MGOe |
| N33UH | 11.4-11.7 KGs | >10.3 KOe | >25 KOe | 31-33 MGOe |
| N35UH | 11.7-12.1 KGs | >10.8 KOe | >25 KOe | 33-35 MGOe |
| N38UH | 12.2-12.6 KGs | >11.4 KOe | >25 KOe | 36-38 MGOe |
| N40UH | 12.6-12.9 KGs | >11.4 KOe | >25 KOe | 38-40 MGOe |
| N30EH | 10.8-11.2 KGs | >10.1 KOe | >30 KOe | 28-30 MGOe |
| N33EH | 11.4-11.7 KGs | >10.3 KOe | >30 KOe | 31-33 MGOe |
| N35EH | 11.7-12.1 KGs | >10.8 KOe | >30 KOe | 33-35 MGOe |
| N38EH | 12.2-12.6 KGs | >10.8 KOe | >30 KOe | 36-38 MGOe |
Thermal Characteristics
| Neodymium Material Type | Maximum Operating Temp | Curie Temp |
| N | 176°F (80°C) | 590°F (310°C) |
| NM | 212°F (100°C) | 644°F (340°C) |
| NH | 248°F (120°C) | 644°F (340°C) |
| NSH | 302°F (150°C) | 644°F (340°C) |
| NUH | 356°F (180°C) | 662°F (350°C) |
| NEH | 392°F (200°C) | 662°F (350°C) |
The Thermal Characteristics listed above are values commonly associated with each magnet’s grade or material. Actual performance in your application may vary with other factors, including the shape of the magnet, the Permeance Coefficient or load line, and how it is used in a circuit. See our in-depth article on Temperature and Neodymium Magnetsfor more details.
Physical and Mechanical Characteristics
| Density | 7.4-7.5 g/cm3 |
| Compression Strength | 950 MPa (137,800 psi) |
| Tensile Strength | 80 MPa (11,600 psi) |
| Vickers Hardness (Hv) | 560-600 |
| Young’s Modulus | 160 GPa (23,200 psi) |
| Recoil Permeability | 1.05 μrec |
| Electrical Resistance (R) | 160 μ-ohm-cm |
| Heat Capacity | 350-500 J/(kg.°C) |
| Thermal Expansion Coefficient (0 to 100°C) parallel to magnetization direction |
5.2 x 10-6?/°C |
| Thermal Expansion Coefficient (0 to 100°C) perpendicular to magnetization direction |
-0.8 x 10-6?/°C |
Plating Characteristics
| Plating Type | Overall Thickness | Salt Spray Test | Pressure Cooker Test |
| NiCuNi (Nickel Copper Nickel) | 15-21 μm | 24 hours | 48 hours |
| NiCu + Black Nickel | 15-21 μm | 24 hours | 48 hours |
| NiCuNi + Epoxy | 20-28 μm | 48 hours | 72 hours |
| NiCuNi + Gold | 16-23 μm | 36 hours | 72 hours |
| NiCuNi + Silver | 16-23 μm | 24 hours | 48 hours |
| Zinc | 7-15 μm | 12 hours | 24 hours |
Each individual layer of Nickel and Copper are 5-7 μm thick. The Gold and Silver plating layers are 1-2 μm thick.
Test results shown to allow comparison between plating options. Performance in your application under your specific test conditions may vary. Salt Spray testing conducted with a 5% NaCl solution, at 35°C. Pressure Cooker Test (PCT) conducted at 2 atm, 120°C at 100% RH.
Measurement Systems
| Unit | cgs System | SI System | English System |
| Length (L) | centimeter (cm) | meter (m) | inch (in) |
| Flux (?) | Maxwell | Weber (Wb) | Maxwell |
| Flux Density (B) | Gauss (G) | Tesla (T) | lines/in2 |
| Magnetizing Force (H) | Oersted (Oe) | Ampere turns/m (At/m) | Ampere turns/in (At/in) |
| Magnetomotive Force (mmf or F) | Gilbert (Gb) | Ampere turn (At) | Ampere turn (At) |
Conversion Between Systems
| cgs System to SI system |
| 1 Oe = 79.62 At/m |
| 10,000 G = 1 T |
| 1 Gb = 0.79577 At |
| 1 Maxwell = 1 Line = 10-8?Wb |
| 1 G = 0.155 lines/in2 |
1 Comment
Sintered Neodymium magnet - KYLE MAGNETICS CO.LTD · 15/05/2018 at 08:33
[…] KM specification test each grade under 15-23 centigrade, check more physical characteristics of magnetic materials, or contact with our sales engineer about your application to get professional […]