High Performance AlNiCo Magnets丨CORT

AlNiCo Magnets Product Overview

AlNiCo magnets, one of the earliest permanent magnetic materials used in industry, are still widely applied today due to their excellent temperature resistance, stable magnetic output, and strong mechanical strength. As a professional magnetic solution provider, CORT MAGNETS delivers high-performance and fully customizable AlNiCo magnets for diverse industrial and scientific applications.

Key Features

Premium Material
Manufactured from high-quality AlNiCo alloy (Aluminum, Nickel, Cobalt with additions of Iron, Copper, Titanium), ensuring durability and magnetic stability.
Various Coatings
- Nickel (Ni)
- Nickel-Copper-Nickel (NiCuNi)
- Zinc (Zn)
- Epoxy
- Gold, Silver
- Parylene
  These coatings enhance corrosion resistance, mechanical protection, or aesthetics.
Superior Temperature Resistance
Curie temperature up to 310–380ºC, maintaining performance in high-heat environments where NdFeB cannot.
Precision Tolerance
Dimensional accuracy up to ±0.1mm, ideal for precision instruments and motors.
Excellent Mechanical & Physical Properties
- Resistivity: 1880–210 μΩ·cm
- Density: 7.5 g/cm³
- Flexural Strength: 25 kg/mm²
- Vickers Hardness: 620 HV
- Recoil Permeability: 1.05
  These values ensure long-term reliability and strength.

AlNiCo Magnets Comparison with Other Magnets

Property	AlNiCo Magnet	NdFeB Magnet (Neodymium)	SmCo Magnet (Samarium Cobalt)	Ferrite Magnet
Energy Product	Medium	Highest	High	Low
Temperature Resistance	Excellent (310–380ºC)	Moderate (≤200ºC)	Good (≤300ºC)	Moderate (≤250ºC)
Coercivity	Low	Very High	High	Medium
Cost	Medium	Higher	High	Low
Typical Applications	Audio, Instruments, Motors	Motors, Wind Energy, Separation	Aerospace, Defense	Speakers, Household Goods

Conclusion:

Need maximum strength → NdFeB
Need corrosion & thermal stability → SmCo
Need stable output at high temperatures → AlNiCo
Need low cost, mass production → Ferrite

Working Principle

The magnetism of AlNiCo magnets comes from the interaction of aluminum, nickel, and cobalt atoms in the alloy lattice. Through specialized heat treatment and magnetic orientation, the magnetic domains align in a highly ordered structure, producing strong permanent magnetism.

Unlike NdFeB magnets, AlNiCo domains remain stable even at very high temperatures, making them ideal for applications requiring high flux density and thermal stability.

AlNiCo Magnets Application Fields

Electroacoustic Devices
Used in microphones, speakers, and sensors – ensuring stable, high-fidelity sound.
Instrumentation
Applied in precision measurement devices where stable magnetic fields are critical.
Industrial Motors & Generators
Suitable for long-term high-speed, high-temperature motor applications.
Magnetic Separation & Detection
Applied in metallurgy, chemical, and food industries to remove impurities.
Research & Education
Ideal for laboratory experiments and teaching demonstrations.

Selection & Customization

When selecting AlNiCo magnets, consider:
- Operating temperature: up to 380ºC
- Magnetization direction: thickness or radial
- Surface coating: for corrosion protection if required
- Tolerance: ±0.1mm for precision use
- Environment: humid/chemical exposure requires Epoxy or Parylene
CORT MAGNETS supports fully customized dimensions, coatings, and packaging.

Industry Case Studies

Audio Manufacturer: Upgraded to AlNiCo magnets for high-end speakers, achieving better thermal stability and sound clarity.
Motor Manufacturer: Improved lifespan and reduced demagnetization in high-speed motors by using AlNiCo instead of ferrite.
Research Institute: Custom AlNiCo magnets supplied for physics labs to study magnetic stability under different conditions.

Why Choose CORT MAGNETS?

Professional manufacturing with strict quality control
Custom solutions for size, coating, and shape
Reliable supply chain with short lead times
Technical support from experienced engineers

Sintered AlNiCo Magnet Technical Parameters Table

Parameter Item	Specification Range	Testing Standard
Material Composition	Al-Ni-Co-Cu-Fe alloy	ASTM A801
Remanence (Br)	1.0-1.4T	IEC 60404-5
Coercivity (Hc)	350-500 Oe	IEC 60404-5
Operating Temperature	-40°C ~ +550°C	ISO 9001:2015
Density	7.0-7.4 g/cm³	ASTM B328
Hardness (Hv)	450-550	ISO 6507-1
Thermal Expansion Coefficient	11×10⁻⁶/°C (20-200°C)	ASTM E228

Frequently Asked Questions—AlNiCo Magnets

1. What are the advantages of AlNiCo magnets compared to NdFeB magnets?

AlNiCo magnets have excellent thermal stability and can operate up to 380ºC without demagnetizing, making them ideal for motors and sensors where NdFeB cannot.

2. Can AlNiCo magnets be customized in size and coating?

Yes. CORT MAGNETS offers multiple coatings (Nickel, NiCuNi, Zinc, Epoxy, Gold, Silver, Parylene) and full size customization according to drawings.

3. How resistant are AlNiCo magnets to corrosion?

AlNiCo has good inherent resistance, but in humid or chemical environments, protective coatings like Epoxy or Parylene are recommended.

4. Are magnetization directions selectable?

Yes. Common options include thickness or radial magnetization, depending on application needs.

5. How does CORT MAGNETS ensure product quality?

Every AlNiCo magnet undergoes strict dimensional, magnetic, and coating inspections, ensuring compliance with international standards and customer requirements.