About Permalloy

Permalloy is an alloy of iron and nickel (Fe-Ni), developed for the purpose of increasing the initial magnetic permeability.

[Origin of the name] Permeability + Alloy

Features of leading varieties

Material variety		Magnetic material, Permalloy	agnetic material, Permalloy
JIS Symbol		PC	PB
Component (wt%)		Ni=77〜78 Mo=5　Cu=4 Fe=Bal	Ni=45 Fe=Bal
Specific gravity		8.62	8.25
Breaking strength (N/m�u)	With finish heat treatment	≦735	490〜635
	Without finish heat treatment	≧685	685〜885
Elongation (%)	With finish heat treatment	O=≧25	O=≦10
	Without finish heat treatment	H material: ≦10
Hardness (Hv)	With finish heat treatment	150〜190	130〜160
	Without finish heat treatment	≧200	≧200
Thermal expansion coefficient （×10-6/℃）	（20〜300℃）	13.6	7.7
Thermal conductivity (cal/cm・℃・sec)		0.08	0.03
Annealing temperature(℃)		1,100	1,100
Initial relative magnetic permeability （μi）		45,000	14,000
Maximum relative magnetic permeability（μm）		160,000	94,000

 

Major products

 

Material

Plate thickness 0.05 〜 1.00�o
Width 10.0 〜 250.0�o

Deep drawn precision parts

▼Magnetic shield case (cap)
Dimensional tolerance (example)

Manufacturing by automated continuous press enables mass production.
Thermal treatment is done in a continuous processing line to ensure sufficient magnetic characteristics.

 

Precision press parts

▼Core (sensor) products

[Transformer core]

　　

E core

Toroidal core

 

[Type EX, dimension of major cores]

Material: Permalloy PC (Unit: mm)

Item No.			Thickness		A			B			C			D			E			F			G			Pieces/kg
EX-14			0.20		14.0			10.5			8.75			1.750			3.50			3.50			1.75			6,660
			0.35		14.0			10.5			8.75			1.750			3.50			3.50			1.75			3,810
EX-16			0.20		16.0			14.0			12.00			2.000			4.00			4.00			2.00			4,460
			0.35		16.0			14.0			12.00			2.000			4.00			4.00			2.00			2,250
EX-19			0.20		19.0			15.0			12.50			2.375			4.75			4.75			2.50			3,440
			0.35		19.0			15.0			12.50			2.375			4.75			4.75			2.50			1,960

Standard sizes are available for each type.
Please specify the dimensions for the alphabet letters on the above drawing.