Permalloy Bar and Rod

From the heart of Hamilton, New Zealand, Hemi Metals is proud to be a trusted manufacturer and supplier of high-performance alloys. We specialize in producing Permalloy bar and rod, a material engineered for exceptional magnetic performance. Our focus is on delivering precision and reliability to industries where advanced electromagnetic properties are critical. By combining local expertise with a commitment to stringent quality standards, we provide solutions that empower innovation and enhance the efficiency of sophisticated technologies both within New Zealand and across the globe.

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Permalloy Round Bars

Permalloy Rectangular Bars

Permalloy Square Rods

What is Permalloy Bar and Rod?

Our Permalloy bar and rod are primarily composed of a nickel-iron alloy, typically containing about 80% nickel and 20% iron. This specific balance gives the material its signature soft magnetic properties, including high magnetic permeability and exceptionally low coercivity. It also exhibits low core losses and is known for its good ductility and ease of machining. This combination of magnetic sensitivity and mechanical workability makes it a versatile choice for engineers designing components that require precise and rapid magnetic response without structural brittleness.

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Permalloy Bar and Rod Specification

Standards :	—
Thickness :	Range from .008″ to .0125″
Hardness :	Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc.
Form :	Bar
Tungsten Grades	HA 190 / HA 1925 / HA 195 / HE 390 / HE 3925 / HE 395 / HE 397

Chemical Compositions of Permalloy Bar

	C	P	S	Mn	Si	Ni	Cr	Co	Mo	Cu	Fe
1J46	≤0.03	≤0.02	≤0.02	0.6-1.1	0.15-0.30	45-46.5	–	–	–	≤0.2	Balance
1J50	≤0.03	≤0.02	≤0.02	0.3-0.6	0.15-0.30	49-50.5	–	–	–	≤0.2	Balance
1J79	≤0.03	≤0.02	≤0.02	0.6-1.1	0.30-0.50	78.5-81.5	–	–	3.8-4.1	≤0.2	Balance
1J85	≤0.03	≤0.02	≤0.02	0.3-0.6	0.15-0.30	79-81	–	–	4.8-5.2	≤0.2	Balance

Permalloy Bar Mechanical Properties

Grade	Resisitivity (μΩ•m)	Desinty (g/cm3)	CuriePoint℃	HighSaturatedmagneto-strictioncoefficient λθ/10-6	Brinellhardness HBS		σbTensile Strength MPa		σsYieldStrength MPa		Elongation (%)δ
Grade	Resisitivity (μΩ•m)	Desinty (g/cm3)	CuriePoint℃	HighSaturatedmagneto-strictioncoefficient λθ/10-6	unan- nealed	an- nealed	unan- nealed	an- nealed	unan- nealed	an- nealed	unan- nealed	an- nealed
1J46	0.45	8.2	400	25	170	130	735		735		3
1J50	0.45	8.2	500	25	170	130	785	450	685	150	3	37
1J79	0.55	8.6	450	2	210	120	1030	560	980	150	3	50
1J85	0.56	8.75	400	0.5	–	–	–	–	–	–	–	–

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Why Hemi Metals?

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Permalloy Bar and Rod Types

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Frequently Asked Questions (FAQ)

Are Permalloy BarSusceptible To Galvanic Corrosion?

Permalloy bars are generally not highly susceptible to galvanic corrosion, as they have good resistance to corrosion. However, when in contact with dissimilar metals, galvanic corrosion may still occur under certain conditions.

Can Permalloy Bar Be Welded?

Yes, Permalloy bars can be welded, but due to their high nickel content, specialized welding techniques, such as TIG or laser welding, and proper precautions are necessary to maintain magnetic properties.

What Sizes and Finishes Are Available for Permalloy Rod?

Permalloy rods are available in various sizes, typically ranging from 1/16" to 4" in diameter. Common finishes include bright, polished, or cold-drawn finishes, depending on the application requirements.

Permalloy Bar and Rod Uses

The unique characteristics of Permalloy bar and rod make it indispensable in applications demanding precise magnetic control. It is commonly machined into cores for transformers, magnetic shields, and inductors used in sensitive electrical instruments. You will also find it in relays, specialized sensors, and components for telecommunications equipment. Its ability to easily magnetize and demagnetize is crucial for devices where rapid switching and minimal energy loss are paramount, supporting advancements in everything from aerospace navigation systems to medical imaging technologies and precision scientific measurement tools.

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