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It is a mixture of resin (PA6, PA 12, PSS) & the Ferrite magnetic powder, after mix together wit the additive, injective produced the magnet is called the Injection Ferrite magnet.

The magnetic power of the Injection Ferrite Magnet is comparatively lower than the Injection NdFeB Magnet, but the price is comparatively lower, this is best fits for the sensor magnetic rings, the micro motor that have complex shape and comparatively lower speed requirements.
 
Magnetic Characteristics & other physical characteristics of Injection Molded Ferrite Magnet- EPF PA6 series
EARTH MAGNETS-EPF- PA6 Series
Test method
Test
method
EPF-140
EPF-150
EPF-160
EPF-160P
EPF-170
EPF-170H
EPF-190
EPF-190H
EPF-200
EPF-220
www.earthmagnets.com
Magnetic power
-
-
Ferrite
Base resin
-
-
PA6
MAGNETIC PROPERTIES
-
-
Anisotropic
Residual flux densityBr
MATS-2010H
mT
240
250
260
272
278
278
287
290
298
305
Coercive forcebHc
MATS-2010H
kA/m
180
180
180
190
190
200
187
185
190
180
Intrinsic coercive forceiHc
MATS-2010H
kA/m
250
230
225
230
220
240
215
205
200
195
Maximum energy productBHmax
MATS-2010H
kJ/m3
11.2
12.0
13.0
14.2
14.8
15.0
15.8
16.5
17.1
18.1
Thermal coefficientΔBr/Br
MATS-2010H
%/℃
-0.19
-0.19
-0.19
-0.19
-0.19
-0.19
-0.19
-0.19
-0.19
-0.19
Thermal coefficientΔHc/Hc
MATS-2010H
%/℃
0.2~0.3
0.2~0.3
0.2~0.3
0.2~0.3
0.2~0.3
0.2~0.3
0.2~0.3
0.2~0.3
0.2~0.3
0.2~0.3
OTHER PROPERTIES
　
　
　
　
　
　
　
　
　
　
　
　
Tensile strength
ASTM D-638
MPa
78
80
78
70
75
70
75
75
75
75
Flexural strength
ASTM D-790
MPa
147
157
147
140
145
145
145
145
145
145
Flexural modulus
ASTM D-790
MPa
17000
17000
18000
21000
22000
22000
22000
22000
23000
23500
Izod impact (with notch)
ASTM D-256
J/m
31
32
32
34
32
32
34
34
36
40
Rockwell hardness coefficient
ASTM D-785
R scale
118
119
120
120
120
120
120
120
120
120
Heat deflection temperature1.82Mpa
ASTM D-648
0 C
163
165
166
177
176
176
176
176
178
180
Specific gravity
ASTM D-792
-
3.22
3.37
3.46
3.53
3.58
3.58
3.71
3.71
3.76
3.83
Water absorption (230C 24 hrs in water)
ASTM D-570
%
0.2
0.17
0.16
0.15
0.15
0.15
0.15
0.15
0.14
0.14
Molding shrinkage coefficient　
EM Method
%
0.5
0.5
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
Coefficient of thermal expansion
EM Method
/℃
4.4X10-
5
4.3X10-5
4.2X10-5
4.0X10-5
3.8X10-5
3.8X10-5
3.5X10-5
3.5X10-5
3.4X10-5
3.1X10-
5
Melt flow rate （2700C x 5 kg)  　
ASTM D-1238
g/10min
45
40
 -
70
 -
 -
 -
 -
 -
 -
Melt flow rate （2700C x 10 kg)  　
ASTM D-1238
g/10min
 -
 - 
70
 -
40
200
40
100
80
150
Flammability
UL94
Class
V-0
 -
V-0
 -
V-0
 -
 -
 -
 -
 -


 
Magnetic Characteristics & other physical characteristics of Injection Molded Ferrite Magnet - EFP PA12 & PPS series
EARTH MAGNETS-EPF- EDN Series
Test method
Test method
EPF-062K
EPF-102
EPF-132
EPF-152N
EPF-172A
EPF-192
EPF-192H
EPF-202
EPF-202F
EPF-212
EPPS-F134L
EPPS-F164L
www.earthmagnets.com
Magnetic power
-
-
Ferrite
Base resin
-
-
PA12
MAGNETIC PROPERTIES
-
-
Anisotropic
Residual flux densityBr
-
mT
105
215
232
260
272
287
290
292
285
305
305
305
Coercive forcebHc
-
kA/m
80
160
175
195
195
190
200
200
195
205
205
205
Intrinsic coercive forceiHc
-
kA/m
159
27
263
265
235
210
235
230
220
230
230
230
Maximum energy productBHmax
-
kJ/m3
1.5
8.5
10.8
13.3
14.5
16.0
16.5
16.6
16.1
18.1
18.1
18.1
Thermal coefficientΔBr/Br
-
%/℃
-0.19
Thermal coefficientΔHc/Hc
-
%/℃
0.2~0.3
OTHER PROPERTIES
Tensile strength
ASTM D-638
MPa
43
54
49
58
58
5452
50
47
44
44
44
44
Flexural strength
ASTM D-790
MPa
74
95
88
108
108
98
96
100
84
85
85
85
Flexural modulus
ASTM D-790
MPa
6000
7500
85000
10000
11000
14000
14000
12000
13500
16000
16000
16000
Izod impact (with notch)
ASTM D-256
J/m
25
34
31
31
33
32
32
33
37
35
35
35
Rockwell hardness coefficient
ASTM D-785
R scale
108
108
108
114
115
115
155
115
102
116
116
116
Heat deflection temperature1.82Mpa
ASTM D-648
0 C
118
12
110
141
145
145
145
120
130
134
134
134
Specific gravity
ASTM D-792
-
2.84
3.03
3.29
3.38
3.52
3.70
3.70
3.71
3.65
3.8
3.8
3.8
Water absorption (230C 24 hrs in water)
ASTM D-570
%
0.06
0.05
0.05
0.04
0.04
0.04
0.04
0.04
0.04
0.04
0.04
0.04
Molding shrinkage coefficient　
EM Method
%
0.7
0.6
0.6
0.5
0.5
0.5
0.5
0.5
0.5
0.4
0.4
0.4
Coefficient of thermal expansion
EM Method
/℃
8.0X10-5
7.2X10-5
7.0X10-5
5.6X10-5
5.4X10-5
4.6X10-5
4.6X10-5
4.3X10-5
4.5X10-5
4.0X10-5
4.0X10-5
4.0X1
0-5
Melt flow rate （2700C x 5 kg)  　
ASTM D-1238
g/10min
-
90
40
60
-
-
-
-
-
-
-
-
Melt flow rate （2700C x 10 kg)  　
ASTM D-1238
g/10min
-
-
-
-
120
60
120
100
150
140
140
140
Flammability
UL94
Class
-
-
V-2
V-1
V-0
-
-
V-0
V-0
V-0
V-0
V-0