EFI Alloy 79 Annealed Sheet

Alternative and trade names
Magnifer 7904®, HyMu 80®, Hipernom®, Moly-Permalloy, Permalloy 80
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Description

A soft magnetic alloy consisting of 80% nickel, 5% molybdenum, and balance iron used where extremely high initial & maximum permeability and minimum hysteresis is needed.

Related Standards

Equivalent Materials

This material data has been provided by Matmatch.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

PropertyTemperatureValue

Density

23.0 °C

8.74 g/cm³

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Dimension

PropertyValueComment

Length

3048 mm

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Mill random length

Thickness

0.25 mm

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Width

762 mm

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Dimensions

Available thicknesses: 0.25mm, 0.36mm, 0.51mm, 0.51mm, 0.64mm, 0.76mm, 1.02mm, 1.27mm, 1.57mm, 3.18mm

Mechanical

PropertyTemperatureValueComment

Elastic modulus

23.0 °C

217 GPa

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Elongation

23.0 °C

40 %

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in 2 in.

Hardness, Rockwell B

23.0 °C

85 [-]

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Tensile strength

23.0 °C

676 MPa

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Yield strength

23.0 °C

262 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

450.0 °C

1.36E-5 1/K

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from 20°C to the mentioned temperature

Melting point

1454 °C

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Specific heat capacity

23.0 °C

460 J/(kg·K)

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Thermal conductivity

23.0 °C

35 W/(m·K)

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Electrical

PropertyTemperatureValue

Electrical resistivity

23.0 °C

5.9E-7 Ω·m

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Magnetic

PropertyTemperatureValue

Coercive force

23.0 °C

1.19 A/m

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Curie temperature

460 °C

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Relative magnetic permeability

23.0 °C

230000 [-]

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Saturation induction

23.0 °C

0.8 T

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Chemical properties

PropertyValue

Carbon

0.03 %

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Iron

Balance

Manganese

0.95 %

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Molybdenum

5 %

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Nickel

80 %

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Phosphorus

0.02 %

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Silicon

0.42 %

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Sulfur

8E-3 %

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Technological properties

Property
Application areas

Common applications of EFI ALLOY 79 are: Toroidal tape-wound cores - instrument transformers, inductive components, earth-leakage circuit breakers; Magnetic shielding - shielding cans, shielding films, spatial shielding arrangements; Ground fault circuit interrupters; Electromagnetic relay parts; Laminations - transformer laminations, transformer cores for modems, stampled rings for electronic earth-leakage breakers, operating at a low magnetic field strengths