Ni-Fe 1j79 79hm Permalloy Strip for Transformers

• Customization: Available
• Product Type: Strip
• Material: Ni,Fe
• Model NO.: 1J79
• Carbon Content: Low Carbon
• Main Chemical Content: Ni,Fe,Mn,Mo
• Density: 8.6 g/cm3
• Curie Point: 450oc
• Volume Resistivity (20oc): 55ohm.M
• Thermal Conductivity: 13.4W/M. Oc
• Initialmagnetic Permeability: Min.40mh/M
• Maximummagneticpermeability: Min.310mh/M
• Coerciveforce: Max.2.0A/M
• Saturationmagneticfluxdensity: 0.73t
• Usage: Pulse Transformers, Relays, Transformer
• Transport Package: in Coil, Carton, Wooden Case
• Specification: RoHS, SGS
• Trademark: Ualloy
• Origin: Zhejiang, China
• HS Code: 72269920
• Production Capacity: 300tons/Year

Product Description

Ni-Fe 1J79 79HM Permalloy Strip for Transformers 

1J79 Common Name: Ni79Mo4, E11c, malloy, permalloy, 79HM
 

Soft magnetic alloy with high initial permeability
Grade	1J79,1J80,1J85,1J86
Size	Strip:(0.03-0.1)mm*(180-250)mm (0.1-1.0)mm*(10-250)mm (1.0-2.5)mm*(100-250)mm Wire:0.1-6.0mm Bar:20-100mm
Features	High or very high initial permeability large permeability, extremely low coercive force, and low saturation magnetic induction.
Application	High sensitivity and small power transformers used in weak magnetic fields, small power magnetic amplifiers, relays, chokes, magnetic heads for magnetic recording devices, magnetic shields, various tape wound cores, cut cores and laminated cores.

Normal composition%

Ni	78.5~80.0	Fe	Bal.	Mn	0.6~1.1	Si	0.3~0.5
Mo	3.8~4.1	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)	8.6
Electrical resistivity at 20ºC(ohm.mm^2/m)	0.55
Coefficient of linear expansion(20ºC~200ºC)X10^-6/ºC	10.3~11.5
Saturation magnetostriction coefficient λθ/ 10^-6	2.0
Curie point   Tc/ ºC	450

 

The magnetic properties of alloys with high permeability in weak fields
1J79	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	17.5		87.5	5.6			0.75
0.1~0.19 mm	25.0		162.5	2.4
0.2~0.34 mm	28.0		225.0	1.6
0.35~1.0 mm	30.0		250.0	1.6
1.1~2.5 mm	27.5		225.0	1.6
2.6~3.0 mm	26.3		187.5	2.0
cold drawn wire
0.1 mm	6.3		50	6.4
Bar
8-100 mm	25		100	3.2

 

Mode of heat treatment
Annealing media	Vacuum 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 rate	1100~1150ºC
Holding time	3~6
Cooling rate	With 100 ~ 200 ºC/ h cooled to 600 ºC, rapidly cooled to 300ºC