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Ni79Mo4 Transformer Core Soft Magnetic Alloy E11c Ni 75-79% Chemical

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City: Shanghai
Province/State: Shanghai
Country/Region: China
Tel: 86-21-66796338
Contact Person:
Mr Qiu

Ni79Mo4 Transformer Core Soft Magnetic Alloy E11c Ni 75-79% Chemical

Brand Name : OHMALLOY
Model Number : 1J85
Certification : SGS, ISO
Place of Origin : China(Shanghai)
MOQ : 20kg
Price : negotiable
Payment Terms : L/C, T/T, Western Union
Supply Ability : 50000kg/month
Delivery Time : 7-20 days
Packaging Details : 10kg/coil
Grade : 1J79, 1J85
Thickness : 0.05mm, 0.08mm
Width : 50mm-100mm
Application : Transformer
Status : Bright, annealed
Chemical : Ni 75-79%
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Ni79Mo4 Transformer Core Soft Magnetic Alloy E11c Ni 75-79% Chemical

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%


Typical Mechanical properties

Yield strengthTensile StrengthElongation

Typical Physical properties

Density (g/cm3)8.6
Electrical resistivity at 20℃(Ωmm2/m)0.55
Coefficient of linear expansion(20℃~200℃)X10-6/℃10.3~11.5
Saturation magnetostriction coefficient λθ/ 10-62.0
Curie point Tc/ ℃450

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


0.1~0.19 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
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 ℃.
The heating temperature and rate1100~1150℃
Holding time3~6
Cooling rateWith 100 ~ 200 ℃/ h cooled to 600 ℃, rapidly cooled to 300℃

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

Sales Manager:Michaeal Qiu.

What's App:+86 13795230939

Tel:+86-21-66796338 Mobile Phone: +86 13795230939

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