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1j79 Soft Magnetic Alloys Strip

Categories Soft Magnetic Alloy
Brand Name: HUONA
Model Number: 1J79
Certification: SGS, ISO, ROHS
Place of Origin: CHINA
MOQ: 20kg
Price: Bargain
Payment Terms: L/C,T/T,Western Union,MoneyGram
Supply Ability: 50ton/Month
Delivery Time: 5-20days
Model NO.: 1J79
Curie Point Tc/ ºC: 450
Resistivity(μΩ.M): 0.55
Thickness: 0.1~10.0 mm
Purity: 81%
Specification: 0.7mm
Surface: Bright
Density: 8.6
Transport Package: Wooden Case
Production Capacity: 50ton/Month
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1j79 Soft Magnetic Alloys Strip

Product Description

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/ºC10.3~11.5
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 300º

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
1j79 Soft Magnetic Alloys Strip
Quality 1j79 Soft Magnetic Alloys Strip for sale
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