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magnetic materials
Material
Residual Flux Density
Br (Gauss)
Coercive Force
Hc (Oersted)
Max. Energy Product Bhmax (MGOe)
Cast Alnico V
12800
640
5.5
Sintered Alnico V
10900
620
3.95
Cast Alnico VIII
8200
1650
5.3
Sintered Alnico VIII
7400
1500
4.0
SmCo 18
8500
8000
18.0
SmCo 22
9500
8600
22.0
SmCo 26
10500
9200
26.0
NdFeB 30H
11600
10000
30.0
NdFeB 38
12550
11700
38.0
Ceramic I
2300
1860
1.00
Ceramic V
3800
2400
3.40
Ceramic VIII
3850
2950
3.50
Flexible Regular
1600
1370
0.60
Flexible High Force
2200
1900
1.10
 
Material
Slope of Load Line at Bhmax
Curie Point
(° C)
Max. Practical Oper. Temp
(° C) / (°F)
Cast Alnico V
18.0
890
540/1000
Sintered Alnico V
18.4
860
540/1000
Cast Alnico VIII
5.0
870
540/1000
Sintered Alnico VIII
5.0
840
540/1000
SmCo 18
1.0
700
260/500
SmCo 22
1.0
825
260/500
SmCo 26
1.0
825
350/660
NdFeB 30H
1.0
300
140/280
NdFeB 38
1.0
310
110/220
Ceramic I
1.2
460
400/750
Ceramic V
1.1
460
400/750
Ceramic VIII
1.0
460
400/750
Flexible Regular
1.2
*
120/248
Flexible High Force
1.2
*
120/248
*Because of bonding agents, flexible magnets may not operate above 120° C
 
Material
Temp Coefficient (%Loss/° C)
Density (lbs/cubic Inch)
Relative Cost By Weight
Cast Alnico V
0.013
0.264
15
Sintered Alnico V
0.007
0.253
10
Cast Alnico VIII
0.013
0.265
15
Sintered Alnico VIII
0.007
0.253
10
SmCo 18
0.030 - 0.045
0.300
100
SmCo 22
0.015 - 0.030
0.300
100
SmCo 26
0.015 - 0.030
0.300
100
NdFeB 30H
0.090 - 0.120
0.267
80
NdFeB 38
0.090 - 0.130
0.267
80
Ceramic I
0.129
0.167
2
Ceramic V
0.190
0.180
2
Ceramic VIII
0.19
0.180
2
Flexible Regular
0.19
0.133
1
Flexible High Force
0.19
0.140
1
       
       
     
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