Home > Product Information : Permalloy materials(YFN-45)
Permalloy materials
Characteristics
•YFN-45 is the PB type permalloy.
•YFN-45 has the high permeability and high magnetic flux density.
•YFN-45 can be supplied by low cost rather than PC permalloy.
•YFN-45 that has big magnetic flux density is the most suitable for yoke parts of watch, clock and so on.
•Referential standards: JIS C2531
Chemical composition(wt%)
| Ni | Fe |
| 45 | Bal. |
Mechanical properties
| Temper | Hardness(HV) |
| A | 120-160 |
| 1/2H | 180-220 |
| R | 200-250 |
Physical properties
Density(20 ) |
g/cm3 | 8.25 |
|---|---|---|
| Electrical resistivity | µ •m |
0.45 |
| Coefficient of thermal expansion | X10-6/ |
7(30-300) |
| Modulus of elasticity | GPa | 160 |
| Curie point | |
450 |
| Melting point | |
1425 |
Our furnace for magnetic annealing
High Temperature annealing
YFN-45's permeability is maximized through high temperature annealing.
| recommendatory atmosphere | Hydrogen |
|---|---|
| recommendatory temp. | 1,100 |
| recommendatory keeping time | min. 2 hours |
| recommendatory cooling condition | cool it down in furnance |
Magnetic properties (DC)
| Initial permeability | µi |  3,000 |
|---|---|---|
| Maximum permeability | µm | 30,000 |
| Coercive force | Hc |  16A/m |
| Magnetic flux density | B1000 | 1.4T |
Hysteresis curve of YFN-45
Magnetic properties (AC)
| Inductance µe | 0.3kHz | 1.0kHz |
|---|---|---|
| 0.15mm(t) | 3,600 |
2,400 |
| 0.30mm(t) | 3,000 |
2,200 |
| 0.40mm(t) | 1,800 |
900 |
Inductance curve of YFN-45
Manufacturing range
| Product form | coil |
|---|---|
| Thickness (mm) | 0.05-1.50 |
| Width (mm) | 6-510 |
Main application
•Stepper motors for watch and clock:
Yoke
Stator
•Transformer cores:
Modem transformer
Audio transformer
•Automotive instruments:
Magnetic shield cases
•Relay cores
•Various yoke parts:
Various magnetic circuits that need high magnetic flux density.
The specifications shown above are those as of Jan., 2015.
The specifications are subject to change without prior notice.
Inquiries
DOWA METALTECH CO.,LTD.
METAL PROCESSING BUSINESS UNIT SALES DEPARTMENT II
TEL 81-(0)53-453-4223 FAX 81-(0)53-453-4226
