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)
80 max
44,000 psi yield
100,000 psi tensile
40%< elongation in 2"
