What kind of material is permalloy?
Permalloy refers to iron-nickel alloys with a wide range of nickel content, typically between 35% and 90%. A key characteristic of permalloys is their exceptionally high permeability in weak magnetic fields. Their saturation magnetic induction typically falls within the range of 0.6 to 1.0 Tesla.
The simplest permalloy is an alloy composed of two elements—iron and nickel. Through appropriate rolling and heat treatment, such alloys can achieve high magnetic permeability. Moreover, by carefully adjusting the proportions of iron and nickel, it’s possible to obtain a relatively high saturation magnetic induction intensity. However, this type of permalloy has low electrical resistivity and poor mechanical properties, which limits its practical applications.
What kind of material is permalloy?
The Permalloy alloys currently widely used are based on iron-nickel alloys with the addition of other elements, such as molybdenum and copper. The purpose of adding these elements is to increase the material’s resistivity, thereby reducing eddy-current losses when the material is used as a magnetic core. At the same time, the added elements can also enhance the material’s hardness, which is particularly advantageous for applications involving wear, such as magnetic heads.
The production process of permalloy is relatively complex. For example, factors such as the rolling process for sheet metal, the annealing temperature, the duration of annealing, and the rate of cooling after annealing all significantly influence the material’s final magnetic properties.
The Pomo alloy grade used in China is 1JXX. In this designation, "J" stands for "precision alloy," and "1" indicates soft magnetic properties. The digits following the "1" serve as serial numbers, typically representing the nickel content in the alloy—for example, 1J50 and 1J85. Pomo alloys have high permeability, making them commonly used in the cores of medium- and high-frequency transformers or in devices that demand strict sensitivity, such as high-frequency (tens of kHz) switching power supply transformers, precision current transformers, residual-current circuit breakers’ current transformers, magnetic shielding components, and magnetic yokes.
Get a Free Consultation
LINCHONG ELEKTROMETER
Lin Chong Electric Appliances specializes in the production of soft magnetic alloy cores and offers a variety of standard customizations tailored to customer needs.
Address: No. 128, Jianghai Street, Hehe Town, YinYang Township, Qidong City, Jiangsu Province, China.
Copyright © 2025 LINCHONG ELEKTROMETER. All Rights Reserved.