SmCo

Samarium Cobalt was the first rare-earth transition-metal magnet to be developed. It was a quantum leap in energy product and made it possible to put a large amount of stable flux in a small package.

SmCo5 and Sm2Co17 have low temperature coefficients and chemically stable. SmCo is very hard and fragile: if you drop it, it will break.

  

Grade Residual Flux Density Coercive Force Max Energy Product Temp Coefficient Operating Temp MMPA
Br HcB HcJ (BH)max TK(Br)
%/°C
TK(HcJ)
%/°C
Tw Max
kGs mT kOe kA/m kOe kA/m MGOe kJ/m3 °C
SmCo 16A 8.0-9.0 800-900 7.7-8.7 613-692 ≥ 25 ≥ 1989 14-18 111-143 -0.05 -0.25 250 SmCo5
SmCo 16B 8.0-9.0 800-900 7.7-8.7 613-692 ≥ 18 ≥ 1432 14-18 111-143 -0.05 -0.25 250
SmCo 20A 8.8-10.0 880-1000 8.0-9.5 637-756 ≥ 25 ≥ 1989 18-22 143-175 -0.05 -0.25 250
SmCo 20B 8.8-10.0 880-1000 8.0-9.5 637-756 ≥ 18 ≥ 1432 18-22 143-175 -0.05 -0.25 250
SmCo 22A 10.0-10.2 1000-1020 8.5-9.3 676-740 ≥ 30 ≥ 2387 20-24 159-191 -0.03 -0.20 350 Sm2Co17
SmCo 22B 10.0-10.2 1000-1020 8.0-9.0 637-716 ≥ 10 ≥ 796 20-24 159-191 -0.03 -0.20 350
SmCo 24A 10.2-10.4 1020-1040 8.7-9.5 692-756 ≥ 30 ≥ 2387 22-26 176-208 -0.03 -0.20 350
SmCo 24B 10.2-10.4 1020-1040 8.0-9.5 637-756 ≥ 10 ≥ 796 22-26 176-208 -0.03 -0.20 350
SmCo 26A 10.4-10.6 1040-1060 9.5-10.5 756-836 ≥ 26 ≥ 2069 24-28 191-223 -0.03 -0.20 350
SmCo 26B 10.4-10.6 1040-1060 9.0-10.0 716-796 ≥ 10 ≥ 796 24-28 191-223 -0.03 -0.20 350
SmCo 28A 10.6-10.8 1060-1080 9.5-10.5 756-836 ≥ 25 ≥ 1989 26-30 207-239 -0.03 -0.20 350
SmCo 28B 10.6-10.8 1060-1080 9.0-10.0 716-796 ≥ 10 ≥ 796 26-30 207-239 -0.03 -0.20 350
SmCo 30A 10.8-11.5 1080-1150 9.5-10.5 756-836 ≥ 25 ≥ 1989 28-32 223-255 -0.03 -0.20 350
SmCo 30B 10.8-11.5 1080-1150 9.0-10.0 716-796 ≥ 10 ≥ 796 28-32 223-255 -0.03 -0.20 350