HYMU 80 Shielding Alloy

HYMU 80 Shielding Alloys

HyMu 80 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 laminations where compactness and weight factors are important.

HYMU 80 SHIELDING ALLOY

MACHINABILITY DATA

METAL FROM STOCK FLYER

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"

HY MU 80 SHIELDING ALLOY

HY-MU 80

SHEET