Many grades of Ring Neodymium Magnet exist to support a variety of industrial applications. The range of SmCo magnet grades typically extends from 16 MGOe to 32 MGOe. This range allows for optimizing cost, performance, and operational temperature resistance.

　　There are two main types of Samarium Cobalt magnet alloy. The older version, typically denoted as (1-5) having one Samarium atom per 5 Cobalt atoms, and the newer Samarium Cobalt magnet alloy, typically denoted as (2-17), having an atomic ratio of two Samarium atoms to 14 – 17 Cobalt atoms. (The 14 – 17 atoms are actually comprised of a mix of transition metals, Cobalt, Copper, and Iron, where Cobalt is the most abundant.)

　　Samarium Cobalt (1-5):

　　Has an Energy Product range of 15 – 24 MGOe and can typically operate up to 250°C. By weight this alloy will be compromised of approximately 35% Samarium and the balance being Cobalt. Typically the more recent (2-17) Samarium Cobalt magnet alloy will be selected for new applications because of the higher Energy Densities and temperature operating points; however, the older alloy is specified on many drawings originating from the late 1970’s through the late 1990’s and oftentimes it cannot be substituted.

　　SmCo Ring Magnets(2-17):

　　Has an Energy Product range of 21 – 32 MGOe and typically operates up to 300°C to 350°C. By weight, this alloy will be comprised of approximately 25% Samarium and the remainder being the Transition Metal blend comprised mostly of Cobalt. The higher Energy Density and operating temperatures allows this magnet alloy to be a favorite choice of designers when magnetic and environmental performance is paramount.

　　The listed values are approximate and should be used as a reference. Any magnetic or physical characteristics should be substantiated before selecting a magnet material.