SmCo materials come in energy products from 16 MGOe up to 33 MGOe. Their high resistance to demagnetizing influences and excellent thermal stability has ensured SmCo as the premium choice for the most demanding motor applications. In addition, the corrosion resistance is significantly higher than, for example, NdFeB (Neodymium Iron Boron). However, we would still recommend coating the magnet in acidic conditions. Its corrosion resistance has also offered a high degree of comfort to those looking to use magnets in medical applications.

SmCo is the most expensive permanent magnet material On a “per pound” basis. However, because of its high energy product, it has achieved considerable commercial success by decreasing the required volume of magnet material to fulfill a certain task. SmCo can typically be used up to 300 °C, though, of course, its actual performance at that temperature is governed strongly by the design of the magnetic circuit. The (approximately) linear demagnetization curve of SmCo materials allows repeatable performance over a wide range of operating conditions. As with all permanent magnet materials, extreme caution must be exercised when handling magnetized components. SmCo can be prone to chipping and should not be used a structural component in an assembly.

Samarium Cobalt is manufactured in two compositions: Sm 1Co 5 and Sm 2Co 17 – often referred to as the SmCo 1:5 or SmCo 2:17 types. 2:17 types, with higher Hci values, offer greater inherent stability than the 1:5 types.

SmCo 26 disc .125
SmCo 26 disc
.125″ Diax.009″Thk

SmCo Assembly
SmCo Assembly

4 Pole SmCo Rotor with Sleeve
4 Pole SmCo
Rotor with Sleeve

SmCo 2 Pole Rotor
SmCo 2 Pole Rotor

SmCo Arc
SmCo Arc

Smco Cylindrical Magnet
Smco Cylindrical
Magnet

.012
.012″ Inner Diameter
on SmCo

Gold plated C Shaped SmCo
Gold plated
C Shaped SmCo

Spec of SmCo

MAGNETIC CHARACTERISTICS AND PHYSICAL PROPERTIES OF SAMARIUM COBALT

Type of MagnetRemanenceIntrinsic CoercivityCoercivityMaximum Energy ProductMaximum Working Temperature
Reference Br mTHci KA/mHc KA/m(BH)max KJ/m3Tw
Designation(KG)(KOe)(KOe)(MGOe)
SmCo 16/25750-880
(7.5-8.8)
≥1989
(≥25)
≥557
(≥7.0)
(14-18)250
SmCo 18/18800-930
(8.9-9.3)
≥1432
(≥18)
≥597
(≥7.5)
127-159
(16-20)
250
SmCo 20/16850-980
(8.5-9.8)
≥1273
(≥16)
≥597
(≥7.5)
143-175
(18-22)
250
SmCo 22/25900-1030
(9.0-10.3)
≥1989
(≥25)
≥613
(≥7.7)
159-191
(20-24)
250
SmCo 24/18980-1080
(9.8-10.8)
≥1432
(≥18)
≥636
(≥8.0)
175-207
(22-26)
250
SmCo 26/151000-1130
(10.0-11.3)
≥1194
(≥15)
≥676
(≥8.5)
191-223
(24-28)
250
SmCo 26/261050-1110
(10.5-11.1)
≥2080
(≥26)
≥744
(≥9.3)
200-215
(25-27)
350
SmCo 28/181030-1130
(10.3-11.3)
≥1432
(≥18)
≥716
(≥9.0)
207-239
(26-30)
350
SmCo 28/261070-1130
(10.7-11.3)
≥2080
(≥26)
≥756
(≥9.4)
216-231
(27-29)
350
SmCo 30/61100-1200
(11.0-12.0)
≥454
(≥5.7)
438
(≥5.5)
223-247
(28-31)
350
SmCo 30/161100-1160
(11.0-11.6)
≥1280
(≥16)
≥712
(≥8.9)
231-247
(29-31)
350
SmCo 32/131120-1200
(11.2-12.0)
≥1000
(≥12.6)
≥800
(≥10.1)
223-263
(28-33)
350
SmCo 33/131130-1210
(11.3-12.1)
≥1000
(≥12.6)
≥850
(≥10.7)
231-271
(29-34)
350

Remarks:

  • The above-mentioned data of magnetic parameters and physical properties are given at room temperature.
  • The maximum service temperature of magnet is changeable due to the ratio length and diameter and enviromental factors.
  • If the material you are looking for is not listed, plaese contact technical sales to discuss about your needs.