Permalloy Core – High-Permeability Nickel-Iron Alloy

Precision magnetic solution for low-frequency and signal-sensitive applications

🔬 Material Overview

Our amorphous cores are made from Fe-based soft magnetic alloys produced through a rapid solidification process, forming a non-crystalline atomic structure. This disordered atomic arrangement eliminates grain boundaries, resulting in superior soft magnetic properties and high electrical resistivity.

Compared to traditional silicon steel, Fe-based amorphous materials enable significantly reduced core losses and better thermal stability in high-efficiency applications.

⚙️ Key Magnetic Properties

• Nickel Content: 80%

• Saturation Flux Density: ~0.8 T

• Initial Permeability: ~80,000 – 100,000

• Maximum Permeability: Up to 300,000 (after annealing)

• Very Low Coercivity: Hc < 0.05 A/m

• Magnetostriction: Negligible (~0.0 ppm) – ideal for stress-sensitive environments

• Extremely Low Core Loss: Especially in the 50 Hz to 10 kHz range

• Resistivity: ~40 µΩ·cm

• Curie Temperature: ~500°C

• Strip Dimensions: Thickness 0.02–0.2 mm, Width 5–50 mm

📐 Material Specifications

• Available Core Forms:
  – Toroidal
  – Laminated Stack
  – Tape-wound Core
  – Custom CNC-Machined Shapes

• Annealing:
  – Field-annealed to control hysteresis loop and optimize permeability

• Surface Options:
  – Bare metal, insulated, or coated depending on application

• Customization:
  – Size, shape, and magnetic performance parameters fully tailorable

🧲 Ideal Applications

• Precision Current Transformers (CTs)

• Magnetic Shielding in Electronics & Medical Devices

• Pulse and Audio Transformers

• Magnetic Sensors & Signal Conditioning

• Magnetic Amplifiers for Telecom and Aerospace

• Low-frequency Inductors and Filters

✅ Why Choose 80% Nickel Permalloy Cores?

Compared with standard silicon steel, ferrite, or lower-Ni alloys, 80% Nickel Permalloy cores deliver:

• Extremely high permeability for signal accuracy

• Minimal core losses at low frequencies

• Excellent EMI suppression and magnetic shielding

• Reliable and customizable magnetic behavior