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17/07/2019, Wed

Permalloy

Institute/Department name

 

Materials engineering department

 

Product Type

 

Goods

 

Product Name

 

Permalloy

 

Product Description

 

Permalloy is a nickel–iron magnetic alloy, with about 80% nickel and 20% iron content. This alloy is notable for its very high magnetic permeability, which makes it useful as a magnetic core material in electrical and electronic equipment, and also in magnetic shielding to block magnetic fields. Commercial permalloy alloys typically have relative permeability of around 100,000, compared to several thousand for ordinary steel. In addition to high permeability, its other magnetic properties are low coercivity, near zero magnetostriction, and significant anisotropic magnetoresistance. The low magnetostriction is critical for industrial applications, allowing it to be used in thin films where variable stresses would otherwise cause a large variation in magnetic properties. Permalloy's electrical resistivity can vary as much as 5% depending on the strength and the direction of an applied magnetic field. Permalloy is used in transformer laminations and magnetic recording heads.

 

Product Application

  • Transformer laminations
  • Relays
  • Recording Heads
  • Deflection and Focusing Yokes
  • Amplifiers
  • Loudspeakers
  • Shielding

 

Product Specifications

 

Magnetic properties

Saturation Flux Density

7,500 gausses

Coercive Force from H = 1 oersted

0.015 oersted

Residual Induction

3,700 gausses

Permeability at B = 100

75,000

Maximum Permeability

  300,000

 

 

Mechanical properties

 

Cold Rolled

Mill Annealed

Annealed for Magnetic properties

Tensile Strength (ksi)

150

90

80

Yield Strength (ksi)

135

35

30

% Elongation in 5 cm

2

40

40

Hardness

32 RC

70 RB

55 RB

 

 

Physical properties

Density

8.74 (g/cm3)

Electrical Resistivity

58 (µΩ-cm)

Specific Heat

0.12 cal/g/°C

Thermal Conductivity

0.047   cal/cm3/sec/o

Thermal Expansion:

12.0 × 10-6 cm/cm/ o

 

 

Product functional specifications

 

It’s customizable up to customer order

Approved and adopted standards

 

Approved by the Metal Materials Domestic industry and the industries of Shahid Hadi

Similar foreign products

 

Permalloy

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