Ring Alnico Magnet  has a circular shape and a hollow center, allowing them to be strung or threaded onto string, rod, or wire..Ring Alnico Magnets  are desirable for their high residual induction, high energies, corrosion resistance, and for the fact that they have the widest temperature stability out of any standard magnetic material.

Ring Alnico Magnets  are based mainly on iron (Fe), aluminum (Al), nickel (Ni) and cobalt (Co). The magnets are fragile and not ductile. Therefore, after the raw metal is melted at high temperature and turned into an alloy, it is cast into a casting mold. These magnets are therefore also known as cast magnets.

Ring Alnico Magnet  achieves high Br values and high temperature stability, readily cause low-temperature demagnetization and thermal demagnetization, achieve high mechanical strength, and offer other advantages. However, these magnets have low magnetic coercive force and readily undergo demagnetization due to an external magnetic field, are unsuited for thin products, and placed
under other constraints. In the design process, it is therefore important to select a method of magnetization
that allows for sufficient shape and magnetic characteristics, and a method of assembly in which consideration is given to demagnetization.

Ring Alnico magnets is valued for their stable magnetic properties and high-temperature resistance. Here are the typical technical parameters for Ring Alnico Magnets :

• 1. Material Composition: – luminum (Al): 8-12% – Nickel (Ni): 15-26% – Cobalt (Co): 5-24% – Copper (Cu): 6% – Iron (Fe): Balance – Small amounts of Titanium (Ti) or Niobium (Nb) may be included to enhance specific properties.
• 2. Magnetic Properties: – Residual Induction (Br): 6,500 – 13,500 Gauss (0.65 – 1.35 Tesla) – Coercive Force (Hc): 640 – 1,800 Oersteds (51 – 143 kA/m) – Intrinsic Coercive Force (Hci): 600 – 1,200 Oersteds (48 – 95 kA/m) – Energy Product (BHmax): 5.5 – 9.5 MGOe (43.75 – 75.6 kJ/m³)
• 3. Physical Properties: – Density: 7.3 g/cm³ – Electrical Resistivity: 47 μΩ·cm – Thermal Conductivity: 46 W/(m·K) – Melting Point: ~1,350°C
• 4. Temperature Stability: – Maximum Operating Temperature: Up to 540°C (1,004°F) – Curie Temperature: 850 – 900°C (1,562 – 1,652°F) – Alnico magnets maintain about 90% of their room-temperature magnetization at temperatures up to 500°C (932°F).
• 5. **Mechanical Properties**: – Hardness: Rockwell C 50-55 – Tensile Strength: 450 – 700 MPa – Compressive Strength: 700 – 1000 MPa 6. Tolerance: – Typical machining tolerance for Alnico magnets is ±0.1mm, which can vary based on specific requirements and manufacturing capabilities. These parameters may vary depending on the specific grade of Alnico magnet and the manufacturer.
• Ring Alnico Magnets are particularly useful in applications where a uniform magnetic field is desired, and they excel in environments with high temperatures and where stability over time is crucial.