HyMu 80 Alloy by Vulcan Metal Group



HyMu 80 is a high-performance, magnetic shielding alloy and unoriented metal with excellent mechanical strength, resistant to both atmospheric and moisture corrosion and particularly resistant to oxidation. 

HyMu 80 Properties and Appearance

HyMu 80 (alloy 79) is an alloy comprised of 80% nickel-iron-molybdenum. It is a dark metal with high luster and can often have a gold or brass tint to it. HyMu80 can withstand high temperatures due to its high initial permeability with minimum hysteresis loss. (wastage due to heat in a magnetic environment). HuMy80 is popular when being used for shielding electrical components from magnetic fields as it is an unorientated metal so will reverse polarity to avoid any magnetic attraction to other metals. 

Chemical Comparison


Physical Properties

Mechanical Properties


Thermal Properties


HyMu 80 Applications

The main characteristic of HyMu80 is high permeability, which is used for shielding against static or low frequency magnetic fields. HyMu 80 is used in technology applications such as home theater systems or recording devices due to its high magnetic strength which helps to produce high quality sound whilst protecting electrical components from stray magnetic fields. This also benefits the medical industry as the high magnetic strength will protect sensitive medical equipment from stray magnetic fields and corrosion.

HyMu 80 is commonly used  in:

  • Transformer cores

  • Recording devices

  • Home Theaters

  • Telephones

  • Tape wound toroids and laminations

  • Phones

  • Protecting sensitive medical equipment, particularly in MRI facilities

  • Protecting electrical components from stray magnetic fields

Find out more about shielding alloys
https://vulcanmetalgroup.com/shielding-alloys/

HyMu 80 Formats supplied:

Vulcan Metal Group supplies HyMu 80 (alloy 79) in strip-coil, sheet, round bar, rod and wire. Custom machined and finished parts supplied to print.

HyMu 80 is referred to in various ways:

  • Generic Name: Alloy 79
  • ASTM Spec: A753 Alloy 4
  • Mil-Spec: N14411C Composition 1 

Manufacturers Names:

  • USA supplier Carpenter Technologies calls it HyMu 80
  • German supplier VDM calls it Magnifer 790
  • In France, the alloy is referred to as Permimphy, and supplied by Aperam
  • MuMetal is another popular name for the material and used generically around the world.

Please contact us for more information and how we can help you.


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Location: 23888 Madison St, Torrance, CA 90505, USA

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