1j79 Soft Strip for Speakers Magnetic Shielded
Product Description
1J79 (Soft magnetic alloy)
(Common Name: Ni79Mo4, E11c, malloy, permalloy, 79HM)
High permeability soft magnetic alloy
High permeability soft magnetic alloy mainly nickel base alloy, nickel content is over 75%, this kind of alloy has the very high initial permeability and permeability.Often referred to as permalloy, also known as the early high magnetic conductivity alloy.They all have good processing performance, can be rolled into thin strip.Alloy is suitable for application in the ac weak magnetic field.Such as TV and instrumentation in various audio transformer, the high accuracy bridge transformer, transformer, magnetic shielding, magnetic amplifier, magnetic modulator, audio head, choke, precision electric meter of the piece and piece, etc
1J79 widely used in radio-electronic industry, precision instruments, remote control and automatic control system.
Normal composition%
| Ni |
78.5~80.0 |
Fe |
Bal. |
Mn |
0.6~1.1 |
Si |
0.3~0.5 |
| Mo |
3.8~4.1 |
Cu |
≤0.2 |
|
|
|
|
| C |
≤0.03 |
P |
≤0.02 |
S |
≤0.02 |
|
|
Typical Mechanical properties
| Yield strength |
Tensile Strength |
Elongation |
| Mpa |
Mpa |
% |
| 980 |
1030 |
3~50 |
Typical Physical properties
| Density (g/cm3) |
8.6 |
| Electrical resistivity at 20ºC(Om*mm2/m) |
0.55 |
| Coefficient of linear expansion(20ºC~200ºC)X10-6/ºC |
10.3~11.5 |
| Saturation magnetostriction coefficient λθ/ 10-6 |
2.0 |
| Curie point Tc/ ºC |
450 |
The magnetic properties of alloys with high permeability in weak fields |
| 1J79 |
Initial permeability |
Maximum permeability |
Coercivity |
Saturation magnetic induction intensity |
Сold-rolled strip/ sheet.
Thickness, mm |
μ0.08/ (mH/m) |
μm/ (mH/m) |
Hc/ (A/m) |
BS/ T |
| ≥ |
≤ |
| 0.01 mm |
17.5 |
87.5 |
5.6 |
0.75 |
| 0.1~0.19 mm |
25.0 |
162.5 |
2.4 |
| 0.2~0.34 mm |
28.0 |
225.0 |
1.6 |
| 0.35~1.0 mm |
30.0 |
250.0 |
1.6 |
| 1.1~2.5 mm |
27.5 |
225.0 |
1.6 |
| 2.6~3.0 mm |
26.3 |
187.5 |
2.0 |
| cold drawn wire |
|
| 0.1 mm |
6.3 |
50 |
6.4 |
| Bar |
|
| 8-100 mm |
25 |
100 |
3.2 |
| Mode of heat treatment 1J79 |
| Annealing media |
Vacuum with a residual pressure not higher than 0.1Pa, hydrogen with a dew point of not higher than minus 40 ºC. |
| The heating temperature and rate |
1100~1150ºC |
| Holding time |
3~6 |
| Cooling rate |
With 100 ~ 200 ºC/ h cooled to 600 ºC, rapidly cooled to 300ºC |
Style of supply
| Alloys Name |
Type |
Dimension |
|
| 1J79 |
Wire |
D= 0.1~8mm |
|
| 1J79 |
Strip |
W= 8~390mm |
T= 0.3mm |
| 1J79 |
Foil |
W= 10~100mm |
T= 0.01~0.1 |
| 1J79 |
Bar |
Dia= 8~100mm |
L= 50~1000 |
Soft magnetic alloy are in weak magnetic field with high permeability and low coercive force of alloys.This kind of alloy are widely used in radio electronics, precision instruments and meters, remote control and automatic control system, the combination is mainly used for energy conversion and information processing, the two aspects of is an important material in the national economy.
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