HYMU 80 Shielding Alloy

HYMU 80 Shielding Alloys

HyMu 80 (sometimes referred to as MuMetal2) is a magnetic shielding alloy that’s comprised of a range of nickel iron alloys. It is 80 percent nickel-iron-molybdeum and its main characteristic includes high permeability. It’s useful for shielding against static or low frequency magnetic fields.

At NE Alloys, a lot of our customers inquire about HyMu 80 for use in:

  • Transformer cores.
  • Telephone and recording devices.
  • Protecting sensitive medical equipment in an MRI facility.
  • Increasing the quality of home theatre systems.
  • Protecting electrical components from stray magnetic fields.
  • Tape wound toroids and lamentations where compactness and weight factors are important.


HYMU 80 SHIELDING ALLOY
also known as Permalloy, HY MU 80, MAG 7904, MIL N 14411 C, COMP. 1 OR ASTM A753-78
NOMINAL DATA SHEET


CHEMICAL COMPOSITION
MAGNETIC PROPERTIES
80 % Ni
"HY MU 80" has a minimum DC permeability
5 % Mo
of 80,000 at a flux density of 40 gauss when
.5 % Si
heat treated by the recommended procedure
.02 % Cu
and test in accordance with ASTM 596
Balance Fe  


PHYSICAL PROPERTIES(ANNEALED CONDITION)
Specific Gravity - 8.7 g/cm
Curie Temperature - 830 F(410 C)
Electrical Resistivity, 349 ohm circ mil/foot 0.55 ohm mm2/m
Density,lb/cu.in. - .316
THERMAL CONDUCTIVITY - 134 Btu-inch/ft hour degree F 0.32 W/cm degree C
Coefficient of Thermal Expansion, in./in./ F x 10(-******)
7.2 in/in/degree F x 10-6 between 70 & 400 F
13 cm/cm/degree C x 10-6 between 30 & 204 C

NOMINAL MECHANICAL PROPERTIES(ANNEALED CONDITION)
86 max (HR15T) or HV160
32,000 psi yield
84,000 psi tensile
40%< elongation in 2"


MUMETAL 2 SHIELDING ALLOY
NOMINAL DATA SHEET

CHEMICAL COMPOSITION
MAGNETIC PROPERTIES
Carbon: 0.05 max
Hardness
Manganese: 1.8 max
Anealed: Rockwell B 75 max
Silicon: 0.50 max
 
Phosphorus: 0.02 max
DC Magnetic Properties
Sulfur: 0.02 max
B=100 Gausses: 15,000
Chromium: 3.0 max
B=2500 Gausses: 52,000
Nickel: 75.0 - 77.0
 
Copper: 4.0 - 6.0
Electrical Resistivity
Iron: Remainder
Ohms circular mil/foot (+/- 5%): 336


HY MU 80 SHIELDING ALLOY
HY-MU 80


SHEET
TK
Width
Length
.004
8/12
36/72
.006
8/12
36/72
.010
12"
36/72
.014
16"
36/72
.020
24
36/72
.025
24
.030
24
.050
24
.062
24




Etching Grade
.004
.006
.010
.014
.020
.025



Coil
TK
Width
.004
SLIT
.006
TO
.010
YOUR
.014
WIDTH



MU Metal 2 Coil
MIL N 14411C COMP 2
 
.020
SLIT TO
0.25
YOUR
.030
WIDTH



HyMu 80 Round Bar
MIL N 14411C COMP 1
 
.130" Diameter x 135"
.218" Diameter x 72"
.250" Diameter x 144"
.380" Diameter x 135"
.511" Diameter x 135"
.760" Diameter x 135"
1.062" Diameter x 135"
1.535" Diameter x 135"
1.875" Diameter x 135"
1.929" Diameter x 135"
2.28" Diameter x 135"
Special Diameter Sizes Upon Request
Alloy 49 (Comp 3) Also Available From Stock




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