High Permeability 1J79 Soft Magnetic Alloy Wire for Precision Magnetic Applications

Product Description

Introduction
1J79 soft magnetic alloy wire is a nickel-iron based precision alloy known for its exceptionally high magnetic permeability. With a typical composition of approximately 79% nickel and 21% iron, this material is designed to offer superior magnetic properties in low-field applications. It is a preferred solution in various magnetic field-sensitive devices requiring high magnetic responsiveness and stability.

Key Features

• Excellent initial and maximum magnetic permeability

• Low coercivity

• High saturation flux density

• Stable performance under thermal and magnetic cycling

• Smooth surface and uniform diameter

Applications
1J79 alloy wire is widely used in the manufacture of:

• Magnetic shields

• Precision current transformers

• Magnetic sensors and probes

• Medical magnetic devices

• Magnetic amplifiers

Working Principle
The high nickel content reduces magnetocrystalline anisotropy, allowing the magnetic domains to rotate more easily under a weak external field. This results in high permeability and low coercive force, making 1J79 ideal for accurate magnetic signal processing.

Technical Specifications

• Precise magnetic response in low-field systems

• Excellent formability and weldability

• Long-term magnetic stability

• Custom sizes and coil packaging available

FAQ

Q1: Is 1J79 suitable for DC magnetic circuits?
Yes, it performs well in both AC and DC fields, especially under low-intensity fields.

Q2: Can it be used in high-frequency transformers?
It can be used, but for higher frequencies, laminated or thin strip versions are preferred.

Q3: What is the typical annealing condition?
Hydrogen annealing at 1150–1180°C with controlled cooling ensures optimal magnetic properties.