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Soft Magnetic Alloy Strip/1j85

Soft Magnetic Alloy Strip/1j85

Heating resistance alloy,Precision Alloy manufacturer / supplier in China, offering Soft Magnetic Alloy/1j85, NiCr/FeCrAl/CuNi resistance heating alloy in the form of wire and strip etc. More favourable price from factory,welcome your inquiry.

Soft Magnetic Alloy Strip/1j85


Common Name: Ni80Mo5, E11c, permalloy, 79HMA, PCS)

 

1J85 is a nickeliron magnetic alloy, with about 80% nickel and 20% iron content. Invented in 1914 by physicist Gustav Elmen at Bell Telephone Laboratories, it 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 ruinously 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. Permalloys typically have the face centered cubic crystal structure with a lattice constant of approximately 0.355 nm in the vicinity of a nickel concentration of 80%. A disadvantage of permalloy is that it is not very ductile or workable, so applications requiring elaborate shapes, such as magnetic shields, are made of other high permeability alloys such as mu metal. Permalloy is used in transformer laminations and magnetic recording heads.

1J85 is widely used in radio-electronic industry, precision instruments, remote control and automatic control system.

 

Normal composition%

Ni

79.0~81.0

Fe

Bal.

Mn

0.3~0.6

Si

0.15~0.3

Mo

4.8~5.2

Cu

≤0.2





C

≤0.03

P

≤0.02

S

≤0.02



Typical Mechanical properties

Yield strength

Tensile Strength

Elongation

Mpa

Mpa

%

980

1030

3~50

 Typical Physical properties

Density (g/cm3)

8.75

Electrical resistivity at 20(Ωmm2/m)

0.56

Coefficient of linear expansion20~200X10-6/ 

10.9~11.2

Saturation magnetostriction coefficient λθ/ 10-6

0,5

Curie point   Tc/

400


 

The magnetic properties of alloys with high permeability in weak fields

1J85

Initial permeability

Maximum permeability

Coercivity

Saturation magnetic induction intensity

Сold-rolled strip/ sheet.

Thickness, mm

μ0.08/ (mH/m)

μm/ (mH/m)

Hc/ (A/m)

BS/ T

0.01 mm

20

87.5

4.8

 

 

 

 

 

 

 

 

 

 

0.75

0.1~0.19 mm

37.5

187.5

1.6

0.2~0.34 mm

50

225

1.2

0.35~1.0 mm

62.5

312.5

0.8

1.1~2.5 mm

50

187.5

1.2

2.6~3.0 mm

43.8

150

1.44

cold drawn wire


0.1 mm

8.7

37.6

6.4

Bar


8-100 mm

37.5

125

1.6

 

Mode of heat treatment  1J85

Annealing media

Vacuum with a residual pressure not higher than 0.1Pa, hydrogen with a dew point of not higher than minus 40 .

The heating temperature and rate

1100~1200

Holding time/h

3~6

Cooling rate

With 100 ~ 200 / h cooled to 500~600 , not less than 400/h cooled to 300


Style of supply

Alloys Name

Type

Dimension


1J85

Wire

D= 0.1~8mm


1J85

Strip

W= 8~390mm

T= 0.3mm

1J85

Foil

W= 10~100mm

T= 0.01~0.1

1J85

Bar

Dia= 8~100mm

L= 50~1000

 


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