Iron-chromium-cobalt magnets Manufacturers online

Iron-chromium-cobalt magnets (FeCrCo magnets) are a special class of magnetic alloys that are valued for applications where flexibility, temperature stability and moderate magnetic force are required.

They offer a mixture of the advantages of hard magnets (e.g. AlNiCo) and softer, machinable magnetic materials.

Below you will find an overview of the material composition, magnetic properties, mechanical properties and production of iron-chromium-cobalt magnets, as well as an overview of their areas of application, their advantages and the challenges of using FeCrCo magnets:

Material composition of iron-chromium-cobalt magnets:

Main components of iron-chromium-cobalt magnets are:

1. Iron (Fe): Basis for the magnetic properties.
2. Chromium (Cr): Gives corrosion resistance and increases mechanical stability.
3. Cobalt (Co): Improves magnetic strength and temperature resistance.

Magnetic properties of iron-chromium-cobalt magnets:

1. FeCrCo magnets are weaker than NdFeB or AlNiCo magnets, but stronger than ferrite magnets.
2. They have a high coercive force and are therefore resistant to demagnetization by external fields.
3. They function stably in a wide temperature range (up to 400-450 °C).
4. The magnetization can be specifically aligned in a preferred direction by heat treatment (anisotropy).

Mechanical properties of iron-chromium-cobalt magnets:

1. FeCrCo materials can be produced in thin wires, foils or complex shapes.
2. These magnets can be processed by mechanical methods (e.g. drilling, cutting) without losing their magnetic properties.
3. High corrosion resistance due to the chromium content.

Production of iron-chromium-cobalt magnets:

1. The material is first shaped by casting or forging.
2. Targeted heat treatment optimizes the magnetic and mechanical properties.
3. After heat treatment, the material can be machined into complex shapes.
4. The magnet is then magnetized in an external field.

Use of FeCrCo magnets:

1. Industrial applications:
Use in precision instruments that require stable magnetic fields.
Use in current, voltage and torque sensors.

2. Electrical engineering:
Components of electric motors, generators and magnetic couplings.
Use in switches and relays.

3. Telecommunications:
Manufacture of microwave components such as insulators and circulators.

4. Automotive industry:
Use in sensors for control units and actuators.
Use in small electric motors for window regulators or mirror adjusters.

5. Medical applications:
- Use in surgical tools and medical devices that require machinable magnets.
- Production of miniature magnets for precision diagnostics or implants.

6. Aerospace:
FeCrCo magnets are used in environments with extreme temperatures and mechanical stresses.
They are suitable for aircraft controls, missile guidance systems and satellites.

7. Research and science:
Use in magnetic experiments and laboratory instruments.
Production of prototypes and special applications due to their flexibility and machinability.

8. Magnetic shields:
Due to their combination of magnetic force and machinability, FeCrCo magnets are used to manufacture shields against electromagnetic interference.

9. Jewelry and design:
Due to their corrosion resistance and machinable properties, FeCrCo materials are also used in jewelry manufacturing and decorative applications.

Advantages of FeCrCo magnets:

• They can be subsequently machined, which is not possible with most types of magnets.
• Work reliably in high-temperature environments.
• Resistant to moderate environmental influences and moisture.
• Can be produced in very thin wires or profiles.
• High resistance to ageing and demagnetization.

Challenges when using FeCrCo magnets:

• The magnetic strength is lower than that of NdFeB or AlNiCo magnets, which makes them unsuitable for applications with high magnetic force.
• Higher costs than ferrite magnets, especially for complex machining.
• Although they are resistant to rust, they are not suitable for highly corrosive chemicals.

Iron-chromium-cobalt magnets are versatile permanent magnets that offer moderate magnetic strength, excellent machinability and high temperature resistance. They are used in specialized applications such as sensor technology, electrical engineering, medicine and aviation, where flexibility and stability are more important than maximum magnetic force. Their range of applications is extended by their unique ability to be machined and formed into complex shapes.

Here is an overview of the most important criteria to consider when buying iron-chromium-cobalt magnets:

When purchasing FeCrCo magnets, it is crucial to consider both the technical requirements of your application and the quality and properties of the magnets.

• The remanence (Br) indicates the magnetic strength that remains after magnetization. Ensure that the remanence meets the requirements of your application.
• Check whether the coercive force is sufficiently high to prevent demagnetization by external fields.
• The energy density (BHmax) describes the overall strength and efficiency of the magnet. Higher values are suitable for powerful applications. FeCrCo magnets offer moderate energy densities.
• FeCrCo magnets are temperature-stable up to 400-450 °C. consider whether your application requires high operating temperatures.
• Check how much the magnetic force decreases with temperature changes.
• The magnetization direction must match the orientation in your application. This should be specified when ordering (axial, radial or a special direction).
• Clarify whether the alloy composition meets the specifications (proportions of Fe, Cr and Co).
• Alloys with a higher cobalt content offer better magnetic strength, but are more expensive.
• FeCrCo magnets are known for their machinability. Make sure that the supplier can deliver precise shapes and tolerances.
• Thanks to the chromium content, FeCrCo magnets are relatively corrosion-resistant. Nevertheless, additional surface treatment may be required if they are used in an aggressive environment.
• Ask for ageing tests or test reports that prove the long-term stability of the magnetic and mechanical properties.
• FeCrCo magnets are available in bars, wires, sheets or blocks. Clarify whether standard shapes are sufficient or customized solutions are required.
• Make sure that the manufacturing tolerances (e.g. length, diameter, thickness) match your requirements.
• If complex geometries are required, check whether the supplier can provide these by machining or shaping.
• Ensure that the magnet is suitable for the temperature range of your application. For applications above 450 °C, alternatives such as AlNiCo may be required.
• FeCrCo magnets are less brittle than other magnet types. Nevertheless, check whether additional housings or protective measures are required if the magnet is exposed to mechanical shocks or vibrations.
• Look for certifications that prove the quality and environmental standards, e.g: ISO 9001: Quality management system. ISO 14001: Environmental management.
• RoHS Conformity with the EU directive on the restriction of hazardous substances.
• REACH: Compliance with EU chemicals directives.
• Request test reports verifying magnetic and mechanical properties and material composition.
• Ensure that all magnets supplied have been tested to specification.
• Choose a supplier who can offer technical advice and help you choose the right magnet for your application.
• Clarify whether the supplier specifies minimum order quantities (MOQ).
• Look for realistic delivery times, especially for customized magnets.
• Magnets in small quantities can be significantly more expensive. If you need them regularly, larger orders can bring cost advantages.
• Compare offers from several suppliers. Make sure that quality, workability and long-term stability justify the price.
• Take into account possible additional costs for:
• Machining or customization to special shapes.
• Coatings or additional protective measures.
• Give the supplier a clear list of your requirements, including magnetic properties, shape, tolerances and environmental conditions.
• Test samples before placing a bulk order to check quality and suitability.
• If you need FeCrCo magnets on a regular basis, a long-term relationship with a reliable supplier can optimize procurement costs and delivery times.

By carefully evaluating these points, you can ensure that you receive FeCrCo magnets that optimally meet the requirements of your application.

Iron-chromium-cobalt magnets can be purchased from various suppliers. Comprehensive information about manufacturers and suppliers of Iron-chromium-cobalt magnets from all over the world can be found on Exportpages.