Table 6 Typical dc magnetic properties of annealed high-permeability nickel-iron alloys.
Data for O.30 to l.52 mm (O.012 to O.060 in.) thickness strip;
ring laminations annealed in dry hydrogen at 1175 oC (2150 oF) (unless otherwise noted),
2 to 4 h at temperature. ASTM A 596
Alloy |
Permeability |
Approximate Induction at maximum Permeability, um |
Residual Induction Br |
Coercive force, Hc |
Saturation Induction, (Bs) |
Resistivity |
|
Initial x 103 |
Maximum, um x 103 |
T |
kG |
T |
kG |
A - m-1 |
Oe |
T |
kG |
u℧⋅cm |
Low Nickel |
|
|
|
|
|
|
|
|
|
|
|
45 Ni-Fe |
7(c) |
90 |
0.6 |
6 |
0.68 |
6.8 |
4 |
0.05 |
1.58 |
15.8 |
50 |
49 Ni-Fe(a) |
6. 1 (c) |
64 |
0.8 |
8 |
0.96 |
9.6 |
8 |
0.10 |
1.55 |
15.5 |
47 |
49 Ni-Fe(b) |
14(c) |
140 |
0.78 |
7.8 |
0.97 |
9.7 |
4 |
0.05 |
1.55 |
15.5 |
47 |
49 Ni-Fe |
17(c) |
150 |
0.75 |
7.5 |
0.90 |
9.0 |
2.4 |
0.03 |
1.55 |
15.5 |
47 |
45 Ni-3Mo-Fe |
6(c) |
60 |
0.62 |
6.2 |
0.89 |
8.9 |
4.8 |
0.06 |
1.45 |
14.5 |
65 |
High Nickel |
|
|
|
|
|
|
|
|
|
|
|
78.5 Ni-Fe |
50(d) |
300 |
0.35 |
3.5 |
0.50 |
5.0 |
1.0 |
0.013 |
1.05 |
10.5 |
16 |
79 Ni-4Mo-Fe |
90(d) |
400 |
0.28 |
2.8 |
0.35 |
3.5 |
0.3 |
0.004 |
0.79 |
7.9 |
59 |
75 Ni-5C u-2Cr-Fe |
85 (d) |
375 |
0.25 |
2.5 |
0.34 |
3.4 |
0.4 |
0.005 |
0.77 |
7.7 |
56 |
(a) Annealed at 955 oC (1750 oF).
(b) Annealed at 1065 oC (1950 oF).
(c) Measured at B 10 mT (100 G).
(d) Measured at B=4 mT (40 G)