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There are a number of major families of permanent magnets available. They range from ferrite, which is low cost and low energy, to rare earth materials, which are more expensive and offer higher performance. Many factors affect the choice of magnetic material, such as operating temperature, size, weight constraints, environmental concerns and required magnetic energy. More information on our specific magnet materials is available through the links below.

Material_Comparison_Graph

 

Material

Max Operating Temperature

Max Magnetic Energy Product

Resistance to Demagnetization

Dark_Blue
Neodymium Iron Boron (Nd-Fe-B)
200°C
52 MGOe
Very High
Green
Samarium Cobalt (Sm-Co)
300°C - 350°C *
32 MGOe
Very High
Orange
Alnico
550°C
10 MGOe
Low
Blue
Bonded Nd-Fe-B
150°C
10 MGOe
High
Brown
Ceramic (Hard Ferrite)
300°C
4 MGOe
Moderate

 

*view grades for grade-specific information