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Data Sheet:

Mumetal Shielding Alloy

Chemical Composition Limits
Weight % Ni Cu Cr S P Si Mn

C

Mo

Fe

HyMu 80

(Comp 1)

 79.0-80.6        0.008 0.02 0.42 0.95 0.03 3.8 -5 Rem

MIL N 14411C

(Comp 2)

 75.0-77.0 4.0-6.0 3.0 0.02 0.02 0.50 1.8 0.05      

 

Mumetal is 80% nickel with additions of iron and molybdenum as main elements in turn this alloy offers an extremely high initial permeability. It is only moderately resistant to moisture and atmospheric corrosion, it used mainly in in transformer cores but is well known for its magnetic properties which are used for shielding electrical components from magnetic fields. "HYMU 80" has a minimum DC permeability of 80,000 at a flux density of 40 gauss when heat treated by the recommended procedure and test in accordance with ASTM 596.

  

AVAILABILITY

Mumetal is available in Sheet, Strip, Bar, Tubes and Rod. For all stock availability contact Sales.

  

SPECIFICATIONS

Permalloy 

HYMU 80 

MAG 7904 

MIL N 14411 C, COMP. 1 

ASTM A753-78 and ASTM 596

   

TYPICAL MECHANICAL PROPERTIES

MU-METAL

Yield Strength (psi) 

Tensile Strength (psi)

Elongation in 2" (%)

44,000 100,000 40

Mechanical Properties in the Annealed Condition.

 

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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 and 400 F
13 cm/cm/degree C x 10-6 between 30 and 204 C

 

Disclaimer    

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

 

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