The alnico magnet is basically composed of aluminum, nickel and cobalt. This type of magnet has a high remanent induction but low coercivity. It presents a great stability in extreme temperatures, maintaining its magnetic characteristics.
The quality of this magnet is the one that presents a better behavior against the increase of temperature. The magnets made with alnico do not present any type of oxidation problems.
Alnico magnets are very useful for situations with humidity, such as ferrite magnets, thus having a great resistance to oxidation. If you are looking for a magnet with great clamping force, do not hesitate to buy the neodymium magnets, they are the strongest.
They are magnets of dark color and rough texture, due to the process of casting to which they are submitted.
We also have horseshoe magnets with different strengths and sizes.