Nickel-Iron Alloy Magnetic Properties
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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)
 
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