Product searchYFN45 Magnetic material Nickel Iron
YFN-45 (45%Ni-Fe)
ApplicationsStepping motors for watches, transformer cores, automobile instruments, relay cores, various magnetic pole pieces, etc.
PB permalloy with high saturation magnetic flux density and high magnetic permeability.
The cost of YFN-45 is lower than 48Ni and 50Ni, which belong to the same PB permalloy group, because it has lower amount of nickel.
It is well-suited for applications that require a large magnetic flux density, such as yoke parts for watches.
Since it has high magnetic permeability and can block magnetic fields, it is also suitable as a shield material for measuring equipment that is easily affected by external magnetism.
Chemical composition
[wt%]
| Ni | Fe | |
|---|---|---|
| Typical values | 45 | Rem. |
Physical properties
| Melting point [℃] | 1425 |
|---|---|
| Curie point [℃] | 450 |
| Density [g/cm3@20℃] | 8.3 |
| Thermal expansion coefficient [10-6/K@30-300℃] |
7 |
| Volume resistivity [μΩ・m] | 0.45 |
| Young’s modulus [kN/mm2] | 160 |
Magnetic annealing
YFN-45 requires magnetic annealing (annealing at high temperature) in order to achieve higher magnetic properties.
| Recommended atmosphere | In hydrogen |
|---|---|
| Recommended heat treatment temperature | 1,100℃ |
| Recommended retention time | 2 hours |
| Recommended cooling conditions | Furnace cooling |
Mechanical properties
| Temper | Vickers hardness(typical value) [HV] |
|---|---|
| A (0.25mmt) |
135 |
| 1/2H (0.15mmt) |
205 |
| H (0.15mmt) |
240 |
DC magnetic characteristics
| Initial magnetic permeability µi [-] | 3,000 Min. |
|---|---|
| Maximum magnetic permeability µm [-] | 30,000 Min. |
| Coercive force Hc [A/m] | 16 Max. |
| Saturation magnetic flux density B1000 [T] | 1.4 Min. |
*Please note that the values in all the tables are reference values and are subject to change without notice.
AC magnetic characteristics
Effective magnetic permeability μe
| Product plate thickness [mm] |
Frequency [kHz] | |
|---|---|---|
| 0.3 | 1.0 | |
| 0.30 | 3,000 Min. | 2,200 Min. |
| 0.40 | 1,800 Min. | 900 Min. |
