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ABOUT SAMARIUM COBALT

Samarium cobalt is a rare earth material made by a powder metallurgical process. Manufactured using binders such as epoxy, samarium cobalt magnets are inherently very brittle. Users are discouraged from grinding material because dry remnants are a fire hazard. Some of the advantages of using samarium cobalt is that it provides excellent temperature stability and as well as excellent corrosion resistance. Because of this, typically coating or plating is not required. Samarium cobalt is excellent for operating in harsh environments were it will be exposed to the elements as well as high operating temperatures.

SAMARIUM COBALT

SAMARIUM COBALT

Samarium cobalt excels in harsh environments – common applications include marine, military, and aerospace.

SAMARIUM COBALT GRADES

Material Grade Energy Product 

(BH)max

 Residual Induction 

Br(min-max)

 Coercive Force

HCb(min-max)

 Intrinsic Coercive Force

Hcj(min-max)

 Density

D

 Rev. Temp Coeff 

a(Br)

 Curie Temp 

TC

 Max Working Temp 

Tw
KJ/m^3 MGsOe T kGs KA/m KOe KA/m KOe g/cm^3 %/°C °C °C
SmCo5 XG16 120~143 15~18 0.77-0.86 7.7-8.6 613-716 7.7-9.0 ≥1194 ≥15.0 8.3 -0.04 ≥740 250
XG16H 120~143 15~18 0.77-0.86 7.7-8.6 613-716 7.7-9.0 ≥1592 ≥20.0
XG18 135~159 17~20 0.81~0.92 8.1~9.2 637~756 8.0~9.5 ≥1194 ≥15.0
XG18H 135~159 17~20 0.81~0.92 8.1~9.2 637~756 8.0~9.5 ≥1592 ≥20.0
XG20 151~175 19~22 0.85~0.95 8.5~9.5 637~756 8.0~9.5 ≥1194 ≥15.0
XG20H 151~175 19~22 0.85~0.95 8.5~9.5 637~756 8.0~9.5 ≥1592 ≥20.0
XG22 167~191 21~24 0.89~1.0 8.9~10.0 661~772 8.3~9.7 ≥1194 ≥15.0
XG22H 167~191 21~24 0.89~1.0 8.9~10.0 661~772 8.3~9.7 ≥1592 ≥20.0
Sm2Co17 XGS24M 175~199 22~25 0.92~1.04 9.2~10.4 318~788 4.0~9.9 398~1194 5.0~15.0 8.4 -0.03 ≥850 350
XGS24 175~199 22~25 0.92~1.04 9.2~10.4 661~796 8.3~10.0 1194~1990 15.0~25.0
XGS24H 175~199 22~25 0.92~1.04 9.2~10.4 661~804 8.3~10.1 > 1990 > 25.0
XGS26M 191~215 24~27 1.0~1.06 10.0~10.6 318~796 4.0~10.0 398~1194 5.0~15.0
XGS26 191~215 24~27 1.0~1.06 10.0~10.6 677~820 8.5~10.3 1194~1990 15.0~25.0
XGS26H 191~215 24~27 1.0~1.06 10.0~10.6 677~820 8.5~10.3 > 1990 > 25.0
XGS28M 207~231 26~29 1.04~1.10 10.4~11.0 318~804 4.0~10.1 398~1194 5.0~15.0
XGS28 207~231 26~29 1.04~1.10 10.4~11.0 677~820 8.5~10.3 1194~1990 15.0~25.0
XGS28H 207~231 26~29 1.04~1.10 10.4~11.0 677~820 8.5~10.3 > 1990 > 25.0
XGS30M 223~247 28~31 1.07~1.12 10.7~11.2 318~804 4.0~10.1 398~1194 5.0~15.0
XGS30 223~247 28~31 1.07~1.12 10.7~11.2 700~828 8.8~10.4 1194~1990 15.0~25.0
XGS30H 223~247 28~31 1.07~1.12 10.7~11.2 700~828 8.8~10.4 > 1990 > 25.0
XGS32M 231~255 29~32 1.09~1.15 10.9~11.5 318~804 4.0~10.1 398~955 5.0~12.0
XGS32 231~255 29~32 1.09~1.15 10.9~11.5 716~836 9.0~10.5 > 955 > 12.0
Low Temp. Coeff.
Sm2Co17		 XGS22LT 159~183 20~23 0.90~0.99 9.0~9.9 677~756 8.5~9.5 ≥1194 ≥15.0 8.4 -0.015 >850 350
XGS24LT 175~199 22~25 0.92~1.02 9.2~10.2 677~756 8.5~9.5 ≥1194 ≥15.0