Permalloy Bar and Rod

Starc Metals stands out as a reliable manufacturer and supplier of Permalloy Bars and Rods right here in Canberra, Australia. We take pride in delivering top-notch nickel-iron alloy products that are crafted for outstanding magnetic performance. Our Permalloy bars and rods are well-known for their impressive magnetic permeability, low coercive force, and minimal core losses, making them perfect for a variety of electromagnetic and electronic applications. At Starc Metals, we focus on precise composition control, exceptional surface finish, and consistent magnetic properties, ensuring our materials meet the high standards of the electrical, telecommunications, and instrumentation industries where magnetic sensitivity and performance are key.

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Permalloy Round Bars

Permalloy Rectangular Bars

Permalloy Square Rods

Table of Contents

What is Permalloy Bar and Rod?

Typically, the composition of our Permalloy Bars and Rods consists of about 80% nickel and 20% iron, with slight variations based on specific grades and the desired magnetic traits. This blend results in high initial and maximum permeability, low hysteresis loss, and remarkable magnetic softness. On the mechanical side, Permalloy offers moderate tensile strength (around 400–600 MPa) and good ductility, making it easy to fabricate and machine. Its stability under different magnetic and temperature conditions makes it an excellent choice for precision magnetic applications that demand consistent and reliable performance.

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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
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 Starc Metals?

Packaging

Modern Equipments

Expert Engineers

Well Maintained

Efficient Factories

Permalloy Bar and Rod Types

Permalloy Hex Bars
Permalloy Hollow Rods
Permalloy Bright Bars
PermalloyTringle Bars
Permalloy Flat Bars
Permalloy Polished Rod

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Frequently Asked Questions (FAQ)

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.

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.

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

You’ll find Permalloy Bars and Rods widely used in transformer cores, magnetic shielding, inductors, sensors, and various electrical components where magnetic efficiency is crucial. They also play a vital role in aerospace, defense, and scientific instrumentation for managing electromagnetic interference (EMI) and magnetic fields. In the electronics sector, Permalloy is utilized in memory storage devices, microphones, and magnetic amplifiers. Thanks to its superior permeability and low magnetic loss, it’s the go-to material for applications that require precise control of magnetic flux and minimal energy dissipation.

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