low price 1J79 wire,Soft Magnetic alloy, supermalloy,magnetic shielding
Product brief introduction
Ohmalloy-1J79 is a nickel–iron magnetic alloy, with about 80% nickel and 20% iron content. Invented in 1914 by physicist Gustav Elmen at Bell Telephone Laboratories, it is notable for its very high magnetic permeability, which makes it useful as a magnetic core material in electrical and electronic equipment, and also in magnetic shielding to block magnetic fields. Commercial permalloy alloys typically have relative permeability of around 100,000, compared to several thousand for ordinary steel.
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 |
|
The magnetic properties of alloys with high permeability in weak fields |
||||
|
1J79 |
Initial permeability |
Maximum permeability |
Coercivity |
Saturation magnetic induction intensity |
|
Cold-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 |
|
Typical Physical properties
|
Density (g/cm3) |
8.6 |
|
Electrical resistivity at 20℃(Ωmm2/m) |
0.55 |
|
Coefficient of linear expansion(20℃~200℃)X10-6/℃ |
10.3~11.5 |
|
Saturation magnetostriction coefficient λθ/ 10-6 |
2.0 |
|
Curie point Tc/ ℃ |
450 |
Style of Supply
|
Alloys Name |
Type |
Dimension |
|
|
OhmAlloy-1J79 |
Wire |
D= 0.1~8mm |
|
|
OhmAlloy-1J79 |
Strip |
W= 8~390mm |
T= 0.3mm |
|
OhmAlloy-1J79 |
Foil |
W= 10~100mm |
T= 0.01~0.1 |
|
OhmAlloy-1J79 |
Bar |
Dia= 8~100mm |
L= 50~1000 |
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