TYPICAL MAGNETIC PROPERTIES--CHEMICAL COMPOSITION OF RARE EARTH MAGNETS
Chemical Composition Magnetic Properties *
MMPA Brief Designation
IEC Code
Reference Max. Energy Product Residual Induction Coercive Force Intrinsic Coercive Force
Alloys Possible Elements (BH)max Br Hc Hci
(MGOe) (kJ/m3) (gauss) (mT) (oersteds) (kA/m) (oersteds) (kA/m)
16/19 R4-1 RE Co5                RE = Sm                           16 130 8300 830 7500 600 19000 1510
18/30 R4-1 RE Co5                RE = Sm                           18 140 8700 870 8500 680 30000 2390
20/16 R4-1 RE Co5                RE = Sm, Pr                      20 160 9000 900 8500 680 16000 1270
20/30 R4-1 RE Co5                RE = Sm, Pr                      20 160 9000 900 8800 700 30000 2390
22/16 R4-1 RE Co5                RE = Sm, Pr                      22 180 9500 950 9000 720 16000 1270
24/7   R4-1 RE2TM17 RE = Sm, TM = Fe,Cu,Co,Zr,Hf    24 190 10000 1000 6000 480 7000 560
24/26 R4-1 RE2TM17 RE = Sm, TM = Fe,Cu,Co,Zr,Hf    24 190 10000 1000 9300 740 26000 2070
26/10 R4-1 RE2TM17 RE = Sm, TM = Fe,Cu,Co,Zr,Hf   26 210 10500 1050 9000 720 10000 800
26/26 R4-1 RE2TM17 RE = Sm, TM = Fe,Cu,Co,Zr,Hf   26 210 10700 1070 9750 780 26000 2070
28/7 R4-1 RE2TM17 RE = Sm, TM = Fe,Cu,Co,Zr,Hf     28 220 10900 1090 6500 520 7000 560
28/26 R4-1 RE2TM17 RE = Sm, TM = Fe,Cu,Co,Zr,Hf   28 220 11000 1100 10300 820 26000 2070
30/24 R4-1 RE2TM17 RE = Sm, TM = Fe,Cu,Co,Zr,Hf   30 240 11600 1160 10600 840 24000 1910
24/41 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co       24 190 10000 1000 9600 760 41000 3260
26/32 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co      26 210 10500 1050 10090 800 31500 2510
28/23 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co      28 220 10800 1080 10300 820 23000 1830
28/32 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co     28 220 10730 1073 10490 830 31500 2510
30/19 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co     30 240 11300 1130 10800 860 19000 1510
30/27 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co     30 240 11300 1130 10800 860 27000 2150
32/16 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    32 260 11800 1180 11200 890 16000 1270
32/31 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    32 260 11600 1160 11100 880 31000 2470
34/22 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co     34 270 11960 1196 11500 920 22250 1770
36/19 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    36 290 12310 1231 11520 920 19140 1520
36/26 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    36 290 12200 1220 11700 930 26000 2070
38/15 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    38 300 12500 1250 12000 950 15000 1190
38/23 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    38 300 12400 1240 12000 950 23000 1830
40/15 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    40 320 12800 1280 12000 950 15000 1190
40/23 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    40 320 12900 1290 12400 990 23000 1830
42/15 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    42 340 13100 1310 12700 1010 15000 1190
44/15 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    44 350 13500 1350 13000 1030 15000 1190
48/11 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    48 380 13750 1375 10300 820 11000 880
50/11 R5-1 RE2TM14B RE = Nd,Pr,Dy TM = Fe,Co    50 400 14100 1410 10300 820 11000 880
* To achieve the properties shown in this table, care must be taken to magnetize to saturation.