Cast Alnico Magnets

Cast Alnico Magnets are widely used in:
Aerospace/Defense: Gyroscopes, radar systems (stable at 550°C)
Automotive: Speedometers, fuel sensors
Consumer Electronics: Guitar pickups, microphones (high acoustic clarity)
Industrial: Motors, magnetic separators

1. Stable at High Temperatures
Cast Alnico Magnets operate from -65°C to 550°C with a Curie temperature of 760–890°C. Maintain reliable magnetic output where other materials degrade — ideal for industrial equipment, aerospace components, and automotive sensors.

2. Strong, Stable Magnetic Field Output
Br: 0.5–1.33 T (5,000–13,300 Gauss). Higher output and better temperature stability than ferrite — suitable for sensing, positioning, and electromagnetic applications requiring consistent performance.

3. Excellent Temperature Resistance
Performs reliably across wide temperature variations. Composition provides outstanding thermal stability — commonly used in high-temperature machinery, industrial sensors, and aerospace systems where reliability matters more than maximum strength.

OEM/ODM services include:
Product Design：Customized length, width, thickness, diameter, and structural design according to equipment requirements.
Magnetic Performance Selection：Selection of suitable Alnico grades according to required Br, Hc, and (BH)max performance.
Application Optimization：Adjustment according to working temperature, installation method, and operating environment.
Surface Treatment Options
None​​: Standard due to inherent oxidation resistance
​Nickel (Ni)​​: For solderability in electronics (e.g., PCB-mounted sensors)
​Painted (Blue/Red)​​: Pole identification (e.g., educational tools)
​Gold/Zinc​​: Low-resistivity coatings for high-frequency applications

Packaging

Standard Packaging
Individual magnets are wrapped with anti-static foam or plastic protection materials and packed into cartons or wooden crates to prevent collision and surface damage.

Bulk Packaging
For large-volume orders, magnets are palletized with moisture-resistant barriers and protective separation materials to ensure safe transportation.

Export Packaging
Magnetic shielding packaging can be provided for air transportation requirements to meet shipping regulations.

Storage and Handling
Cast Alnico Magnets should be stored with keepers when necessary to maintain magnetic stability. Due to their brittle nature, strong mechanical impact and sudden pressure should be avoided during handling.

1. Solving Magnetic Performance Loss in High-Temperature Environments
Many industrial customers experience magnetic degradation when using standard magnets in high-temperature equipment. Cast Alnico Magnets provide stable performance with operating temperatures up to 550°C, helping manufacturers maintain reliable equipment operation.

2. Improving Equipment Reliability and Reducing Maintenance
For aerospace, automotive, and industrial equipment manufacturers, magnetic components must provide stable performance over long service periods. Cast Alnico Magnets offer excellent thermal stability and corrosion resistance, helping reduce replacement frequency and maintenance costs.

3. Meeting Customized Magnet Requirements
Standard magnet sizes may not fit specialized equipment designs. Cast Alnico Magnets support customized shapes, dimensions, and magnetic characteristics, allowing manufacturers to develop application-specific magnetic components.

1. Are Cast Alnico Magnets stronger than NdFeB magnets?
No. Cast Alnico Magnets generally have lower magnetic energy compared with NdFeB magnets. However, they provide superior temperature stability and can maintain performance in environments where NdFeB magnets may lose magnetic properties.

2. Can Cast Alnico Magnets be customized for OEM projects?
Yes. Manufacturers can customize Cast Alnico Magnets according to customer requirements, including dimensions, magnetic grade, shape, magnetization direction, and assembly design.

3. Why choose Cast Alnico Magnets instead of Ferrite Magnets?
Compared with ferrite magnets, Cast Alnico Magnets provide higher residual induction and better temperature resistance. They are suitable for applications requiring stronger magnetic performance and higher operating temperatures.

4. Can Cast Alnico Magnets be machined after casting?
Yes. However, Alnico magnets are hard and brittle materials. Machining usually requires diamond tools or EDM processes to avoid cracking or structural damage.

5. What is the typical lead time for customized Cast Alnico Magnets?
The production lead time depends on product design, tooling requirements, and order quantity. Customized cast Alnico magnet orders typically require around 25–30 days for production.

6. Do Cast Alnico Magnets require coatings?
Normally, Cast Alnico Magnets do not require coatings because they have inherent corrosion resistance. However, optional coatings such as Nickel (Ni), Gold, Zinc, or painted surfaces can be provided for specific applications.

7. How should Cast Alnico Magnets be packaged for international shipping?
For international shipments, Cast Alnico Magnets are usually packed with protective foam, plastic wrapping, cartons, or wooden crates. Magnetic shielding can be added when required for air freight compliance.