Super high initial permeability and high permeability, super low coercivity and low saturation magnetic induction. Fe-Ni Soft Magnetic Alloy (Permalloy) Core 1. Material Grade:  1J50,1J79, 1J85 2. Features and ApplicationsThe iron cores can be customized according to the user's size and performance requirements, adopting the crafts such as coiling, laminating, rivet stacking, self fastening and rubber molding. This kind of iron cores has excellent magnetic performances of super high initial permeability and high permeability, super low coercivity and low saturation magnetic induction.They are suitable for the application in weak magnetic field, can be used for manufacturing high sensitivity and small power transformer, low power magnetic amplifier, relay, head of magnetic recording device, zero sequence current transformer, power converter, precision current transformer, magnetic amplifier, power transformer, choke, pulse transformer, change polarity pulse transformer, DC voltage converter, magnetic modulator, constant inductance element, unipolar pulse transformer, magnetic shielding, and so on.  3. Specifications and performances of Material

Grade	Standard	Strip Thickness (mm)	Permeability Uo when 0.001 magnetic field	Maximum Permeability Um	Coercivity Hc	Saturation Magnetic Induction Bs
			Gs/Oe	Gs/Oe	Oe	Gs
			Not less than	Not less than	Not less than	Not less than
1J50	YB/T5251-93	0.1	3200	32000	0.18	15000
		0.2	3600	40000	0.14
		0.3	4000	45000	0.13
		0.5	3600	45000	0.12
		0.8	3300	42000	0.16
		1.0	3000	38000	0.20
	Enterprise Standard	0.1	8000	40000
		0.2	8000	40000
		0.3	8000	40000
1J79	YB/T5251-93	0.05	20000	150000	0.03	7500
		0.1	22000	200000	0.02
		0.2	24000	220000	0.015
	Enterprise Standard	0.05	20000	110000
		0.1	22000	140000
		0.2	24000	145000
1J85	YB/T5251-93	0.05	20000	150000	0.02	6500
		0.1	90000	200000	0.015
		0.2	95000	220000	0.01
		0.3	90000	250000	0.009
		0.5	75000	230000	0.012
		0.8	70000	200000	0.015
		1.0	70000	200000	0.025
	Enterprise Standard	0.05	60000	110000
		0.1	80000	150000
		0.2	80000	150000
		0.3	70000	140000

Note: “YB/T5251-93” in above table means testing the magnetic performance in the DC state, while enterprise standard means in the AC 50Hz state, according to the user’s actual usage requirements.

Fe-Ni Soft Magnetic Alloy (Permalloy) Core