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>>HOME >> Technical Alerts >> Magnet Comparison

 

These materials span a range of properties that accommodate a wide variety of application requirements. The following is intended to give a broad but practical overview of factors that must be considered in selecting the proper material, grade, shape, and size of magnet for a specific application. The chart below shows typical values of the key characteristics for selected grades of various materials for comparison. These values will be discussed in detail in the following sections.


Table Magnet Material Comparisons

Material

Grade

Br

Hc

Hci

BHmax

Tmax (Deg C)*

NdFeB

39H

12,800

12,300

21,000

40

150

SmCo

26

10,500

9,200

10,000

26

300

NdFeB

B10N

6,800

5,780

10,300

10

150

Alnico

5

12,500

640

640

5.5

540

Ceramic

8

3,900

3,200

3,250

3.5

300

Flexible

1

1,600

1,370

1,380

0.6

100

* Tmax (maximum practical operating temperature) is for reference only. The maximum practical operating temperature of any magnet is dependent on the circuit the magnet is operating in.




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