Neodyimum: NdFeB - neodymium-iron-bor is the strongest magnetmaterial on the market.
Ferrite: Ferrite is not as strong as neodymium, but it is cheaper and can handle a higher temperature.
Alnico: Aluminum-nickel-cobalt is suitable for magnetic "tight" constructions.
SmCo: Samarium-cobalt is a temperaturestable high-energy material.
Our magnetcalculator is a handy tool to specify the holding force for each permanent -magnet.
NOTE: Theoretical values, may vary from real world results.