Best Alnico Magnets AI pick
Chosen by an AI model from its trained knowledge, with its reasoning.
AI pick (brand): Master Magnetics
Master Magnetics sells cast alnico bar and horseshoe magnets that come with keepers and are made for teaching, sensing and high-temperature use.
Not for: Anyone who needs maximum holding strength in a small size, where neodymium is far stronger.
What the AI looks for in Alnico Magnets
- Operating temperature
- Choose alnico when the magnet must work at temperatures well above what neodymium or ferrite tolerate, up to roughly 500°C class. Alnico has the best temperature stability of the common permanent magnet materials, which is the main reason to buy it today.
- Demagnetization risk
- Store horseshoe and bar magnets with their steel keeper and keep them away from strong opposing magnets. Alnico has low coercivity, so opposing fields or repeated separation from steel can permanently weaken it.
- Grade
- Alnico 5 is the common general-purpose grade, while alnico 8 resists demagnetization better. Grade sets the trade-off between field strength and resistance to being demagnetized.
- Cast versus sintered
- Cast alnico suits larger and complex shapes, and sintered alnico suits small precise parts. The process determines available shapes, tolerances and mechanical strength.
Brands that matter
- Master Magnetics: Common source of alnico bars and horseshoes with keepers.
- Eclipse Magnetics: Long-standing maker of alnico horseshoe and educational magnets.
What to avoid
- Storing alnico magnets loose without keepers.
- Buying alnico for raw holding power.
Questions
Why is my alnico magnet weaker than it used to be?
It was likely partially demagnetized by an opposing field or by being stored without a keeper; alnico is far more prone to this than neodymium.