Material Sales Overview

Not just a fabricator of custom magnetic shields, MuShield is also a distributor of magnetic shielding materials. All of MuShield’s magnetic shielding materials meet ASTM A753 Alloy Type 2, 3 or 4 and are sourced from only the finest domestic and international mills.

If you plan to manufacture your own magnetic shields using MuMetal or Alloy 49, MuShield can supply these magnetic shielding materials in sheets, foils, round bar, wire, plates, forgings and seamless tubing. All stock comes in a temper suitable for stamping, punching, bending, machining, and welding.

MuShield Magnetic Shielding Materials Offered:

MuMetal High Permeability Material per ASTM A753 Alloy Types 3 and 4

Soft magnetic nickel-iron alloy with about 80 % nickel, 4.2 – 5.2 % molybdenum, a saturation induction of approximately 8,000 Gauss, the highest technically obtainable permeability, (Max >350,000) and a very low coercive force.

49% Nickel Medium Permeability Alloy per ASTM A753 Alloy Type 2

Soft magnetic nickel-iron alloy with about 50 % nickel, 50% Iron, with a saturation induction of approximately 12,500 Gauss, an initial permeability of 40,000 and a maximum permeability of 150,000.

Alloy 49 exhibits high permeability at low induction, yielding adequate magnetic shielding medium to high flux density magnetic fields.

Silicon Iron Alloys and Iron Cobalt Alloys

Silicon Iron is predominately and Iron alloy with 2 – 4 % silicon added, exhibiting a saturation induction of approx. 21,000 Gauss, an initial permeability of 6,000 and a maximum permeability of 60,000.

Silicon Iron exhibits high permeability at high induction, yielding superior magnetic shielding of high flux density magnetic fields.

Cryoperm Cryogenic Magnetic Shielding

Cryoperm is a soft magnetic nickel-iron alloy with about 80 % nickel, 4.2 – 5.2% molybdenum, a saturation induction of approx. 8000 Gauss, the highest technically obtainable permeability, (Max > 350,000) and a very low coercive force. Cryoperm exhibits very high permeability at very low induction, yielding superior magnetic shielding attenuation of low flux density magnetic fields.

In addition, Cryoperm is the magnetic shielding alloy of choice for cryogenic applications. Cryoperm exhibits very high permeability at 4.2 – 10 degrees Kelvin.

Forms Available:

Sheets

  • Sizes 24″/30″ x 120″
  • Thicknesses– .014″, .020″, .025″, .030″, .040″, .050″, .062″ & .125″

Foils

  • Up to 15″ widths
  • Custom slitting available
  • Thickness: .002″, .004″, .006″ & .010″

Round Bar & Wire

  • Diameters: .005″ – 2.00″

Plates & Forgings

  • 10″ maximum width
  • Thickness: .135″ & up, by request
  • Diameters to 5.00″

Seamless MuMetal Tubing

  • Custom sizes
  • .080″ – 2.25″ diameters

MuShield Sample Kits

If you wish to do your own testing, or need a small amount of magnetic shielding materials, MuShield offers the following sample kits:

The MuShield Magnetic Shield Sample and Design Kit ($195)

MuMetal High Permeability Foil- 1 of each
Material per ASTM A753 Alloy Type 4 and MIL-N-14411 Composition 1

  • .004″ x 15″ x 12″
  • .006″ x 15″ x 12″
  • .010″ x 15″ x 12″

MuMetal High Permeability Sheet- 1 of each
Material per ASTM A753 Alloy Type 4 and MIL-N-14411 Composition 1

  • .020″ x 6″ x 8″
  • .040″ x 6″ x 8″
  • .060″ x 6″ x 8″

Alloy 49 Medium Permeability Sheet- 1 of each
Material per ASTM A753 Alloy Type 2 and MIL-N-14411 Composition 3

  • .020″ x 6″ x 8″
  • .040″ x 6″ x 8″

MuShield Low Permeability (High Saturation) Silicon Iron Sheet- 1 of each

  • .007″ x 14.5″ x 12″

Laminated Adhesive – Double Sided

  • 2 Square ft

Technical Details Found in the Kit

  • “How Magnetic Shielding Works”
  • “Designing a Magnetic Shield”
  • “The Math Behind Magnetic Shielding: Selecting the Proper Thickness”
  • “Selecting Magnetic Shielding Materials: High, Medium and Low Permeability”
  • “Prototyping With High Permeability Magnetic Shielding”
  • “Heat Treating Magnetic Shielding Materials”
  • “Heat Treating vs. Annealing”
  • “Hydroforming and its Value to Magnetic Shielding”
  • “Magnetic Shielding Materials”