Magnetic Properties of Sintered NdFeB Magnets
Remanence Coercivity Force
Intrinsic Coercive
Force
Max. Energy Product
Br Hcb Hcj ( BH ) max
maximum Operating Temp.
Grade
mT kGs kA/m kOe kA/m kOe kJ/m3 MGOe
N27 1030-1080 10.3-10.8 ≥796 ≥10.0 ≥955 ≥12 199-231 25-29 80 °C
N30 1080-1130 10.8-11.3 ≥796 ≥10.0 ≥955 ≥12 223-247 28-31 80 °C
N33 1130-1170 11.3-11.7 ≥836 ≥10.5 ≥955 ≥12 247-271 31-34 80 °C
N35 1170-1220 11.7-12.2 ≥868 ≥10.9 ≥955 ≥12 263-287 33-36 80 °C
N38 1220-1250 12.2-12.5 ≥899 ≥11.3 ≥955 ≥12 287-310 36-39 80 °C
N40 1250-1280 12.5-12.8 ≥907 ≥11.4 ≥955 ≥12 302-326 38-41 80 °C
N42 1280-1320 12.8-13.2 ≥915 ≥11.5 ≥955 ≥12 318-342 40-43 80 °C
N45 1320-1380 13.2-13.8 ≥923 ≥11.6 ≥955 ≥12 342-366 43-46 80 °C
N48 1380-1420 13.8-14.2 ≥923 ≥11.6 ≥876 ≥12 366-390 46-49 80 °C
N50 1400-1450 14.0-14.5 ≥796 ≥10.0 ≥876 ≥11 382-406 48-51 60 °C
N52 1430-1480 14.3-14.8 ≥796 ≥10.0 ≥876 ≥11 398-422 50-53 60 °C
30M 1080-1130 10.8-11.3 ≥796 ≥10.0 ≥1114 ≥14 223-247 28-31 100 °C
33M 1130-1170 11.3-11.7 ≥836 ≥10.5 ≥1114 ≥14 247-263 31-33 100 °C
35M 1170-1220 11.7-12.2 ≥868 ≥10.9 ≥1114 ≥14 263-287 33-36 100 °C
38M 1220-1250 12.2-12.5 ≥899 ≥11.3 ≥1114 ≥14 287-310 36-39 100 °C
40M 1250-1280 12.5-12.8 ≥923 ≥11.6 ≥1114 ≥14 302-326 38-41 100 °C
42M 1280-1320 12.8-13.2 ≥955 ≥12.0 ≥1114 ≥14 318-342 40-43 100 °C
45M 1320-1380 13.2-13.8 ≥995 ≥12.5 ≥1114 ≥14 342-366 43-46 100 °C
48M 1360-1430 13.6-14.3 ≥1027 ≥12.9 ≥1114 ≥14 366-390 46-49 100 °C
50M 1400-1450 14.0-14.5 ≥1033 ≥13.0 ≥1114 ≥14 382-406 48-51 100 °C
30H 1080-1130 10.8-11.3 ≥796 ≥10.0 ≥1353 ≥17 223-247 28-31 120 °C
33H 1130-1170 11.3-11.7 ≥836 ≥10.5 ≥1353 ≥17 247-271 31-34 120 °C
35H 1170-1220 11.7-12.2 ≥868 ≥10.9 ≥1353 ≥17 263-287 33-36 120 °C
38H 1220-1250 12.2-12.5 ≥899 ≥11.3 ≥1353 ≥17 287-310 36-39 120 °C
40H 1250-1280 12.5-12.8 ≥923 ≥11.6 ≥1353 ≥17 302-326 38-41 120 °C
42H 1280-1320 12.8-13.2 ≥955 ≥12.0 ≥1353 ≥17 318-342 40-43 120 °C
45H 1300-1360 13-13.6 ≥963 ≥12.1 ≥1353 ≥17 326-358 43-46 120 °C
48H 1370-1430 13.7-14.3 ≥995 ≥12.5 ≥1353 ≥17 366-390 46-49 120 °C
30SH 1080-1130 10.8-11.3 ≥804 ≥10.1 ≥1592 ≥20 223-247 28-31 150 °C
33SH 1130-1170 11.3-11.7 ≥844 ≥10.6 ≥1592 ≥20 247-271 31-34 150 °C
35SH 1170-1220 11.7-12.2 ≥876 ≥11.0 ≥1592 ≥20 263-287 33-36 150 °C
38SH 1220-1250 12.2-12.5 ≥907 ≥11.4 ≥1592 ≥20 287-310 36-39 150 °C
40SH 1240-1280 12.5-12.8 ≥939 ≥11.8 ≥1592 ≥20 302-326 38-41 150 °C
42SH 1280-1320 12.8-13.2 ≥987 ≥12.4 ≥1592 ≥20 318-342 40-43 150 °C
45SH 1320-1380 13.2-13.8 ≥1003 ≥12.6 ≥1592 ≥20 342-366 43-46 150 °C
28UH 1020-1080 10.2-10.8 ≥764 ≥9.6 ≥1990 ≥25 207-231 26-29 180 °C
30UH 1080-1130 10.8-11.3 ≥812 ≥10.2 ≥1990 ≥25 223-247 28-31 180 °C
33UH 1130-1170 11.3-11.7 ≥852 ≥10.7 ≥1990 ≥25 247-271 31-34 180 °C
35UH 1180-1220 11.8-12.2 ≥860 ≥10.8 ≥1990 ≥25 263-287 33-36 180 °C
38UH 1220-1250 12.2-12.5 ≥876 ≥11.0 ≥1990 ≥25 287-310 36-39 180 °C
40UH 1240-1280 12.5-12.8 ≥899 ≥11.3 ≥1990 ≥25 302-326 38-41 180 °C
28EH 1040-1090 10.4-10.9 ≥780 ≥9.8 ≥2388 ≥30 207-231 26-29 200 °C
30EH 1080-1130 10.8-11.3 ≥812 ≥10.2 ≥2388 ≥30 223-247 28-31 200 °C
33EH 1130-1170 11.3-11.7 ≥836 ≥10.5 ≥2388 ≥30 247-271 31-34 200 °C
35EH 1170-1220 11.7-12.2 ≥876 ≥11.0 ≥2388 ≥30 263-287 33-36 200 °C
38EH 1220-1250 12.2-12.5 ≥899 ≥11.3 ≥2388 ≥30 287-310 36-39 200 °C
Physical Properties of Sintered NdFeB Magnets
Temp.Coeff.of Br -0.11%/ °C Temp.Coeff.of Hc -0.60%/ °C
Density 7.3-7.5g/cm 3 Electrical Resistivity 114 μΩ ..cm
Vickers Hardness 600Hv Flexural Resistivity 25kg/mm
Tensile Strength 8.0Kg/mm2 Coeff. Of Thermal Expansion 4X10 -6 / °C
Specific Heat 0.12Kcal/Kg Thermal Conductivity 7.7kcal/[m.h. °C ]
Young’s Modulus 1.6X10[11]N/m2 Rigidity 0.64N/m2
Poisson’s Ratio 0.24 Compressibility 9.8x10-12m2/N
Curie Temperature 310-340 °C