High Permeability 1J85 Soft Magnetic Alloy Wire for Precision Electromagnetic Applications

Product Description

Product Overview
1J85 Soft Magnetic Alloy Wire is a high-nickel, high-permeability magnetic alloy wire composed mainly of iron, nickel (approximately 80%), and molybdenum. This alloy is also known by its international equivalents such as Permalloy 1J85 wire or Fe-Ni-Mo soft magnetic wire. With its exceptional magnetic permeability and low coercivity, 1J85 is widely used in precise electromagnetic applications that demand accurate and efficient magnetic response.

Material Characteristics

• Chemical Composition: Fe-Ni-Mo (Ni ≈ 80%)

• Color: Bright metallic silver

• Standard Diameters: 0.05mm – 2.0mm (custom sizes available)

• Surface: Bright, smooth, free from oxidation

• Density: ~8.7 g/cm³

• Curie Point: Around 450°C

• Electrical Resistivity: ~0.55 μΩ·m

• Packaging: Coils, spools, or straight rods

Key Applications

• Magnetic sensors and shielding

• Transformers and inductors

• Magnetic heads for audio and storage devices

• Choke coils and precision magnetic circuits

Working Principle
The 1J85 wire operates by allowing magnetic flux to pass through it with minimal energy loss, thanks to its ultra-high initial and maximum permeability. It responds quickly to low magnetic field strength and is ideal in circuits where precise control of magnetic properties is required.

Technical Specifications

• Ultra-high magnetic permeability

• Low coercivity and hysteresis loss

• Stable performance across frequency ranges

• High resistivity reduces eddy current loss

• Easy to wind and process for small components

FAQ
Q1: What is the difference between 1J85 and standard permalloy?
A1: 1J85 contains molybdenum, which improves stability and permeability compared to standard permalloy.

Q2: Can 1J85 wire be used in transformers?
A2: Yes, it’s ideal for small precision transformers requiring high permeability.

Q3: Is heat treatment required after forming?
A3: Yes, optimal magnetic properties are achieved after annealing in a protective atmosphere.