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MuShield high permeability magnetic shielding material is a non-oriented 80% nickel-iron-molybdenum alloy which offers extremely high initial permeability and maximum permeability with minimum hysteresis loss.

It meets military specification MIL-N-14411 C (MR), and ASTM A-753-78 standard specification.

DC MAGNETIC PROPERTIES
Coercive force from H=1.0 Oe, Oersted 0.008 to 0.02
Hysteresis loss from H=1.0 Oe, erg/cm3 per cycle 18 to 24
DC MAGNETIC PROPERTIES
Form µ at B = 40 G µ max Ho from H=1 Oersted
Bar, Wire 50,000 200,000 0.02 max.
DC hysteresis loss from
  H = 1 Oe, erg/cm3 per cycle . . . 16
Induction, gauss . . . . . . . . . . . . 7,300
Residual Induction, gauss . . . . 3,500
  (Split strip or split rod specimens)


AC MAGNETIC PROPERTIES, 60 Hz
Minimum Limits
Thickness
in.          mm
µ 40 G µ 200 G µ 2000 G
0.0251 0.635 35,000 40,000 55,000
0.0141 0.356 55,000 65,000 95,000
0.0061 0.152 65,000 85,000 135,000
0.0022 0.051 70,000 90,000 220,000
1 Ring laminations 1 1/2" (38.1 mm)
   OD x 1" (25.4 mm) ID specimens
2 Tape toroid specimen
PHYSICAL PROPERTIES:
Specific gravity 8.74
Density -- lb/in3 0.316
                kg/m3 8747
Thermal conductivity  
    Btu-in/ft2/hr/°F 240
    W/m· K 34.6
MuShield Magnetic Shielding Material
Type analysis:
Carbon 0.02%      Nickel 80.00%
Manganese 0.50% Molybdenum 4.20%
Silicon 0.35% Iron Balance
Electrical Resistivity
    ohm-cir mil/ft 349
    microhm-mm 580
Temperature coefficient of electrical resistivity
    per °F from 0/930°F 0.0006
    per °C from -17.8/499°C 0.0011
Curie temperature 860°F (460°C)
Melting point 2650°F (1454°C)
Specific heat, Btu/lb · °F 0.118
                          kJ/kg · K 0.494
COEFFICIENT OF THERMAL EXPANSION
Temperature   Coefficient
°F °C 10 -6 /°F 10 -6 /°C
-103 to 77 -75 to 25 6.00 10.80
-58 to 77 -50 to 25 5.94 10.70
-11 to 77 -25 to 25 5.78 10.40
77 to 122 25 to 50 6.83 12.30
77 to 212 25 to 100 6.89 12.40
77 to 392 25 to 200 7.09 12.76
77 to 572 25 to 300 7.22 13.00
77 to 752 25 to 400 7.39 13.30


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