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Heat Treatment Permalloy Strip Used in Radio Transceiver

China Heat Treatment Permalloy Strip Used in Radio Transceiver, Find details about China Permalloy Strip, 1j79 Strip from Heat Treatment Permalloy Strip Used in Radio Transceiver

Density (g/cm3)
8.6
Curie Point
500
Surface
Bright
Condition
Annealing
Electrical Resistivity
0.55
Trademark
Ohmalloy
Transport Package
Wooden Case
Specification
0.5 mm
Origin
China
HS Code
7226999001
Density (g/cm3)
8.6
Curie Point
500
Surface
Bright
Condition
Annealing
Electrical Resistivity
0.55
Trademark
Ohmalloy
Transport Package
Wooden Case
Specification
0.5 mm
Origin
China
HS Code
7226999001
OhmAlloy-1J79  (Soft magnetic alloy)
(Common Name: Ni79Mo4, E11c, malloy, permalloy, 79HM)

Ohmalloy-1J79 is a nickel-iron 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.
Ohmalloy-1J79 widely used in radio-electronic industry, precision instruments, remote control and automatic control system.
 

Normal composition%

Ni78.5~80.0FeBal.Mn0.6~1.1Si0.3~0.5
Mo3.8~4.1Cu≤0.2    
C≤0.03P≤0.02S≤0.02  
 

Typical Mechanical properties

Yield strengthTensile StrengthElongation
MpaMpa%
98010303~50
 

Typical Physical properties

Density (g/cm3)8.6
Electrical resistivity at 20ºC(Om*mm2/m)0.55
Coefficient of linear expansion(20ºC~200ºC)X10-6/ºC 10.3~11.5
Saturation magnetostriction coefficient λθ/ 10-62.0
Curie point   Tc/ ºC450
 

The magnetic properties of alloys with high permeability in weak fields
1J79Initial permeabilityMaximum permeabilityCoercivitySaturation magnetic induction intensity
Сold-rolled strip/ sheet.
Thickness, mm		μ0.08/ (mH/m)μm/ (mH/m)Hc/ (A/m)BS/ T
≥≤
0.01 mm17.587.55.6









0.75
0.1~0.19 mm25.0162.52.4
0.2~0.34 mm28.0225.01.6
0.35~1.0 mm30.0250.01.6
1.1~2.5 mm27.5225.01.6
2.6~3.0 mm26.3187.52.0
cold drawn wire 
0.1 mm6.3506.4
Bar 
8-100 mm251003.2
 
Mode of heat treatment  1J79
Annealing mediaVacuum with a residual pressure not higher than 0.1Pa, hydrogen with a dew point of not higher than minus 40 ºC.
The heating temperature and rate1100~1150ºC
Holding time3~6
Cooling rateWith 100 ~ 200 ºC/ h cooled to 600 ºC, rapidly cooled to 300ºC


Style of supply
Alloys NameTypeDimension 
OhmAlloy-1J79WireD= 0.1~8mm 
OhmAlloy-1J79StripW= 8~390mmT= 0.3mm
OhmAlloy-1J79FoilW= 10~100mmT= 0.01~0.1
OhmAlloy-1J79BarDia= 8~100mmL= 50~1000

 

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