High Initial Permeability Permalloy 1J79 Series for Magnetic Shielding and Transformers
Product Summary: Our high permeability Permalloy series includes grades 1J79, 1J85, 1J50, 1J54, 1J34, and more, offering initial permeability from 10,000 to 200,000. These alloys are designed for applications requiring high sensitivity and low distortion, such as magnetic shielding for precision instruments, signal transformers, current sensors, and gyroscopes. They exhibit extremely low coercivity and hysteresis loss, ensuring faithful signal transmission.
Key Selling Points
Ultra-High Initial Permeability (μi up to 200,000): Provides superior electromagnetic shielding and signal transfer efficiency, proven in satellite communication and precision measurement projects.
Low Coercivity (Hc ≤ 1.0 A/m for 1J85): Minimizes hysteresis loss and distortion, critical for weak signal transformers.
Low Magnetostriction (≤ 1 ppm): Prevents dimensional changes during magnetization, maintaining precision of gyroscopes and torque motors.
Wide Temperature Stability: Magnetic performance fluctuation less than 3% from -60°C to 130°C, suitable for aerospace and industrial electronics.
Uniform Grain Structure: Vacuum hydrogen annealed for consistent properties batch-to-batch.
Technical Specifications
Parameter
1J79
1J85
1J50
1J34
Initial Permeability μi
≥20,000
≥80,000
≥10,000
≥15,000
Max Permeability μmax
≥200,000
≥350,000
≥150,000
≥180,000
Coercivity Hc (A/m)
≤2.0
≤1.0
≤4.0
≤2.4
Saturation Bs (T)
0.75
0.70
1.50
0.65
Resistivity (μΩ·cm)
55-65
65-75
40-50
60-70
Curie Temp. (°C)
460
400
500
440
Models and Options
Available grades: 1J79, 1J85, 1J50, 1J54, 1J34, 1J80, and others. Forms: strip, wire, bar, stamped shielding cans.
Materials and Structure
Nickel-iron alloys (Ni 36-80%, Mo up to 4%, balance Fe). Fine equiaxed grains after vacuum annealing. Thickness tolerance ±0.002 mm.
Applications
Magnetic shielding housings for precision instruments and satellite equipment
Signal transformers, audio transformers, and current transformers
Current sensors and earth leakage circuit breakers
Gyroscope and torque motor components
Weak magnetic field sensors
Customization
Custom thickness, width, and shaped parts. MOQ 50 kg. Payment: 30/70. Delivery: FOB, FCA, DAP, CIF, CPT.
Case Study
A precision instrument manufacturer required ultra-low hysteresis material for current transformers. Using 1J79, they achieved distortion-free signal transmission with sensitivity improvement of 20% over previous materials.
FAQ
Which grade has the highest permeability? 1J85 offers the highest μi (≥80,000) and μmax (≥350,000).
Can these alloys be used for high frequency? Effective up to 1 MHz, but core loss increases; lower thickness reduces eddy currents.
Are you able to supply slit coils? Yes, we supply strip in widths 2-300 mm.
What is the typical lead time? 15-30 days depending on quantity.
Do you offer samples? Yes, with freight collect.
Is the material RoHS compliant? Yes, our alloys are lead-free.
Can you provide magnetic performance test reports? Yes, with every shipment.
Inquiry Information
Contact Alex Zhang: chengyuan.alexey@gmail.com | Tel/WhatsApp: +86 13673186216
Image Filename and Alt Suggestions
Main image: permalloy-1j79-strip.png (Alt: Permalloy 1J79 strip for magnetic shielding) Detail 1: permalloy-1j79-packaging.png (Alt: Packaged high permeability Permalloy coils) Detail 2: permalloy-1j79-rolling.png (Alt: Rolling process for high permeability Permalloy)
