Soft magentic-iron nickel alloy permalloy 80 Plate

Soft Magnetic -Iron-Nickel alloy

Description                                          Â

Permalloy 80 is an alloy of nickel, iron and molybdenum. It is a soft magnetic alloy with exceptionally high magnetic permeability. The alloy has a low coercivity, near zero magnetostriction, and significant anisotropic magnetoresistance. The low magnetostriction is critical for industrial applications, where variable stresses in thin films would otherwise cause a ruinously large variation in magnetic properties.

Available Forms

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TABLE 1 Â Â Â Chemical Composition

S	Mn	Si	P	S	Cr	Ni	Mo	Co	Fe
0.05	0.8	0.5	0.02	0.01	0.30	78.5-80.0	3.8-4.1	0.5	Bal.

Notes:

1.The shape and dimensions of the alloys are in compliance with ASTM A 753 UNS N14080(Mo4)

2. Higher magnetic property possible for strip

3. content of Cu ≤0.3

TABLE 2 Â sical Properties(Annealed Alloy)

Resistivity (µΩ•m)	0.60
Saturation Induction,KG	7.8
Density(g/cm3)	8.74
Cure Temperature,°C	460

                                            Permeability Curve

              Permeaility Curve of HyMu 80 (δ=1.0mm)

  Further Process-(Heat Treatment)

Use a non-oxidizing atmosre such as dry hydrogen,argon,or equivalent ,or a Vacuum. Appropriate safety precaution must be taken when working with highly flammable atmosres.

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Annealing VS Heat-treatmentÂ

The definition of annealing is: “heat metal and allow it to cool slowly, in order to remove internal stresses and toughen or soften it.” While we need to anneal Them and other magnetic shielding alloys during the magnetic shield fabrication process, we do not anneal for maximum magnetic permeability. As noted in the definition, the annealing step is done to relieve stress within the material that was introduced as a part was being formed or bent.

When we are heat-treating our HyMu 80 magnetic shielding materials, we are actually changing the sical properties by enlarging the grain structure, allowing for more magnetic flux to be absorbed by the magnetic shield.

In conclusion, both annealing and heat-treating are necessary during the magnetic shield fabrication process, but both serve a very different purpose. If you need to relieve stress in material, soften or toughen it, you want to anneal it. If you are trying to achieve maximum permeability, you want to heat treat the material.It should also be noted that material in our kinds have been Non-annealed &annealed for forming, but is not heat-treated for maximum magnetic permeability.

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 Important Notice

Chemical composition,sical and Magnetic properties will be engineered according to specific customer requirements.Therefore chemical composition,sical and magnetic properties might be different to values listed in this document. Information about product characteristics or applicability of materials are shown only for informative purposes.

 Sample PolicyThe samples are big enough (typically about 200mm in length for strip or plate) to get an understanding of the material characteristics, meanwhile custom-made sample available !  Â

If you still have questions about the material , do not hesitate to PAUL with any specific questions.