SmCo Magnets & Permanent Magnets

SmCo Rare Earth Magnets Overview

Two common compositions of SmCo magnets are Sm1Co5 and Sm2Co17. Generally, the cost of SmCo magnets is higher than NdFeB magnets. As a big advantage, SmCo magnets can operate at higher temperatures up to 300 degrees Centigrade. SmCo magnets are widely used in applications in which higher operating temperature and higher corrosion and oxidation resistance are crucial. The main ingredient of SmCo permanent magnet is metal cobalt(CoY99.95%). So its price is high!


SmCo Rare Earth Magnets Properties


Physical Characteristics



Key Advantages

SmCo magnets can operate at higher temperatures up to 300 degrees Centigrade.
High magnetic performance - up to about 32MGOe.
No need to be protected against oxidation.
Quick Leads

Density - 8.3 g/ cm³ (Sm1Co5), 8.4 g/ cm³ (Sm2Co17)
Manufacturing process - sintering (most common), with some injection molding and compression bonding.
Various shapes-- blocks, bars, discs, rings, arc segments, cylinders, etc.
Wide range of Grades - from about 1410 to 3214. (First 2 digits represent BH.max, and second two digits represent Intrinsic Coercivity, Hci.)
High magnetic performance - up to about 32MGOe.
Saturation magnetizing field required - about 50kOe
Operate at higher temperatures up to 300°c.

Common Applications

High performance motors   Magnetic couplings    Magnetic separators    watches   Transducers   Speakers   Instruments   Medical equipments   Positional detectors   Various magnetism spreading devices   Generators  Magnetic processors   magnetic derrick    electrical engineering