Each kind of material magnet has a different Grade, this often deal with the magnet friends will know, some people ask what is the meaning of N40 magnet? What is the temperature resistance of NdFeB N40 magnets? Today's article AOMAG Magnetics will say a few words.
Magnetic Characteristics
|
Grade |
Remanence (Residual Flux Density) |
Coercive Force - Intrinsic Coercive Force |
||||||||
|
Br |
Hcb |
Hcj |
||||||||
|
KGs |
T |
KOe |
KA/m |
KOe |
KA/m |
|||||
|
Nom |
Min |
Nom |
Min |
Nom |
Min |
Nom |
Min |
Min |
Min |
|
|
N40 |
12.7 |
12.5 |
1.27 |
1.25 |
11.6 |
11.3 |
947 |
923 |
12 |
955 |
|
Grade |
Maximum Energy Product |
Temp.Coef. |
Relative Recoil Permeability |
Max Work Temperature |
||||
|
(BH)max |
aBr |
aHcj |
µ rec |
|
||||
|
MGOe |
KJ/m3 |
(20°C) |
(20°C) |
°C |
||||
|
Nom |
Min |
Nom |
Min |
(%/°C) |
(%/°C) |
L/D=0.7 |
||
|
N40 |
40 |
38 |
318 |
302 |
-0.11 |
-0.6 |
1.05 |
80 |
Physical Characteristics
|
Chararcteristic |
Symbol |
Unit |
Data |
|
Density |
D |
G/cm3 |
7.5 |
|
Vickers Hardness |
Hv |
D.P.N |
570 |
|
Compression Strength |
C.S |
N/mm2 |
780 |
|
Thermal Expansion Coefficient |
// 10>-6/K |
3.4 |
|
|
| 10-6/K |
-4.8 |
||
|
Electric Resistance |
R |
µO.cm |
150 |
Plating Characteristics
|
Coating |
Coating Thickness |
Corrosion-Resistant |
Coating Porosity |
|
Ni-Cu-Ni |
15-20 |
>48 |
<0.1 |
|
(Continued from Table Above) |
Magnetic Flux Loss |
Color |
PCT |
|
<0.1 |
silver |
120°C 2atm 100%RH 12Hr |
Above is the introduction of NdFeB strong magnet grade N40. N40 is one of the grades of neodymium magnets, the maximum working temperature is 80℃, and it is also one of the grades that customers choose more often, with higher cost performance. If you have an offer for N40 magnets (other grades are also available), please contact AOMAG Magnetics.