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External diameter
6,5 [mm] +0,1/-0,1
Internal diameter
2 [mm] +0,1/-0,1
Height
20 [mm] +0,1/-0,1
magnetizing direction along dimension
6,5 [mm] Diameter
Grade
N38
Magnet type
Neodymium
Magnetic field in geometrical center of the magnetic pole surface
0,4 [T]
Coating
Nickel (NiCuNi)
Maximum working temperature
≤ 80 [°C]
Magnetic moment
6130 [nWb]x[m]
Weight
4,5 [g]
Performance parameters
For flat magnets and magnets mounted in the open magnetic circuit working temperature may be insignificantly lower. For high magnets and magnets mounted in the closed magnetic circuit working temperature equals max. working temperature for a given material. Curie’s temperature is ~ 310°[C]. Temperature coefficient of remanence TK(Br: approx. ~0,12 %/°[C]. Temperature coefficient of coercivity TK(HcJ): approx. -0,6 %/°[C].
All the numbers quoted were obtained as a result of tests with one specific item in a room temperature and are intended to serve for comparison of practical magnetic properties of magnets offered by the shop.
Magnetic properties of material grade N38
remanence Br |
1,21 - 1,25 [T] |
coercivity HcB |
min. 899 [kA/m] |
coercivity HcJ |
min. 955 [kA/m] |
energy product (BH)max |
286 - 302 [kJ/m3] |
| Magnetic properties of a particular material, together with its shape, volume, max. working temperature and direction of magnetization have influence on practical magnetic properties of a magnet. |
| As an example, you will find attached a graph of a course of the II quadrant of magnetic hysteresis loop for a material grade N38. |
Physical properties
Density |
~7,5 [g/cm3] |
Vickers’ hardness (HV) |
~600 [kg/mm2] |
Resistivity |
~144 [uOhm x cm] |