Precision alloy 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. Precision alloy is used mainly 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 tested in accordance with ASTM 596

Physical Properties (Annealed Condition)

Specific Gravity - 8.7g/cm
Curie Temperature - 830°F (410°C)
Electrical Resistivity, 349 ohm circ mil/foot 0.55 ohm mm²m
Density lb/cu.in. - 316
Thermal Conductivity - 134 btu-inch/ft hour °F 0.32 W/cm °C
Coefficient of Thermal Expansion, in./in. °F x 10 (-******)
7.2in/in °F x 10-6 between 70 and 400F
13cm/cm/ °C 10-6 between 30 and 204 °C  Precision alloy  Precision alloy  Precision alloy  Precision alloy  Precision alloy  Precision alloy  Precision alloy  Precision alloy  

Fe-Ni Soft Magnetic Alloy (GBn198-1988)

Supermalloy

Chinese 1J85

Ni80Mo5

precision alloy precision alloy precision al

Precision Supermalloy alloy is used in manufacturing components for radio engineering, telephony, and telemechanics instruments.

PRODUCT APPLICATION

Permalloy

Permalloy is used in transformer laminations and magnetic recording head sensors. in its initial application, permalloy was wrapped around the insulated copper conductors of telecommunication cables, reducing signal distortion through improved inductive compensation of cable capacitive reactance.

High-performance magnetic cores such as toroids and stacked laminations

Magnetic shielding to protect sensitive components from extraneous magnetic fields

Magnetic sensors

Current sensors

Any delicate application requiring high permeability magnetic material, with a low coercive field and low losses, in the range from low frequency up to 1MHz