MuMETAL® High Permeability Magnetic Shielding Alloy ASTM A753
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Chemical Composition:

MuMETAL® Chemical Composition % In Weight*

Nickel (Ni) 80-82% 
Molybdenum (Mo) 3.5-6%  
Manganese (Mn) 0.8% max
Silicon (Si) 0.5% max
Cobalt 0.5% max
Copper 0.30% max
Chromium 0.30% max

Phosphorus 0.02% max
Sulfur 0.01% max
Carbon (C) 0.05% max
Iron (Fe) Balance

*Composition may vary by production lot.

mumetal_stress_annealed_sheet_data.pdf
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mumetal_fully_annealed_foil_data.pdf
File Size: 180 kb
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mumetal_round_bar_data.pdf
File Size: 226 kb
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machining_mumetal.pdf
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Material Properties:

TYPICAL PHYSICAL PROPERTIES*
Density : 0.316 lb/in³ [8.7g/cm³]
Melting Temp : 2642°F [1450°C]
Curie Temp : 788°F [420°C]
Resistivity : 60 μΩ​cm
Thermal Conduction : 19 (W/​°Km)
​Specific Heat : 460 (
J.Kg-¹ .°K-¹)
​
TYPICAL MECHANICAL PROPERTIES*

​Stress Annealed  Properties
​Hardness : 160 Hv 
Tensile Strength : 700 MPa
0.2 % Yield Strength : 280 MPa
Elongation : 45 %
​Grain Size: 6-8


Final Annealed Properties
​Hardness : <120 Hv
Tensile Strength : 530 MPa
0.2 % Yield Strength : 160 MPa
Elongation : 32 %
​Grain Size: 0-3

*Data for each material thickness and/or lot may vary.

TYPICAL  MAGNETIC PROPERTIES*

DC μ @ 40 gauss 80,000

DC μ @ 100 gauss 105,000

DC μ maximum >400,000 

DC Hc <0.007 Oe [0.6 A/m]

DC Br (gauss) 4,000

DC Bs (gauss) 7,600


AC 60Hz μ @ 40 gauss 65,000

*Data are typical of .014" [0,36mm] final annealed sample and should not be construed as maximum or minimum values for specification or final design. Data for each material thickness and/or lot may vary.

Picture
3-axis Helmholtz coil inside MuRoom testing MuMetal three layer Zero-Gauss chamber

B-H Curve:

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*Data are typical of .014" [0,36mm] final annealed sample and should not be construed as maximum or minimum values for specification or final design. Data for each material thickness and/or lot may vary.

For spreadsheet  versions of our BH curve, please contact us.

​For more technical information on soft magnetic nickel-iron alloys visit our full website here
MAGNETIC SHIELD CORPORATION
Perfection Mica Company
740 N. Thomas Drive
Bensenville, IL 60106 U.S.A.
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MuMETAL®, Co-NETIC®, NETIC®, AA CABLE SHIELD®, and MUROOM® are registered trademarks of Magnetic Shield Corporation, U.S.A. All rights reserved.