Samarium Cobalt

The high temperature rare
earth magnet.

Strong, stable and corrosion resistant.

Samarium Cobalt

EAM Samarium Cobalt Magnets

The original “rare earth” magnet material, Samarium Cobalt (SmCo) has been commercially available for more than three decades. While it has been replaced in many projects by newer materials, SmCo continues to perform in applications where no other materials can provide the required combination of characteristics.

SmCo magnets boast a unique set of attributes – high magnetic strength, excellent corrosion resistance, and good stability at elevated temperatures. SmCo magnets can be used in situations where operating temperatures will exceed 500° F. As a result, in applications requiring a strong, corrosion resistant magnet that will be exposed to high temperatures, SmCo remains unmatched.

SmCo is not only resistant to high temperature, but also highly coercive and very stable over a wide temperature range. This allows the field generated by SmCo magnets to remain relatively constant even after being exposed to numerous heating and cooling cycles. While Alnico magnets are similarly stable, they are far weaker magnetically than magnets made from SmCo.

Please consult with an EA Magnetics project specialist regarding your particular SmCo magnet application for more information.

Properties

Samarium Cobalt (SmCo17)
Magnetic Material Characteristics

Download this data in PDF format – EAM-SmCo17-Properties.pdf – 58kb

Material and Grade *Max Op Temp (C) Curie Temp (C) Br (Gauss) Hc (Oersted) Hci (Oersted) Bhmax MGOe
MAX MIN MAX MIN MAX MIN MAX MIN
XG 22 / 25 350 800 10,700 9,400 9,800 9,000 26,000 25,000 23 22
22 / 20 350 800 10,700 9,400 9,800 9,000 29,000 28,000 23 22
22 / 36 350 800 10,700 9,400 9,800 9,000 33,000 32,000 23 22
XG 24 / 25 360 800 10,600 10,000 10,000 9,200 26,000 25,000 25 24
24 / 30 360 800 10,600 10,000 10,000 9,200 29,000 28,000 25 24
24 / 35 360 800 10,600 10,000 10,000 9,200 33,000 32,000 25 24
XG 26 / 16 300 800 11,100 10,500 10,300 9,300 15,000 14,000 26 25
26 / 20 300 800 11,100 10,500 10,300 9,300 19,000 18,000 26 25
26 / 25 300 800 11,100 10,500 10,300 9,300 23,000 22,000 26 25
26 / 30 300 800 11,100 10,500 10,300 9,300 27,000 26,000 26 25
XG 28 / 16 300 800 11,300 10,700 10,600 10,000 14,000 13,000 28 27
28 / 20 300 800 11,300 10,700 10,600 10,000 18,000 17,000 28 27
28 / 25 300 800 11,300 10,700 10,600 10,000 23,000 22,000 28 27
28 / 30 300 800 11,300 10,700 10,600 10,000 27,000 26,000 28 27
XG 30 / 12 300 800 11,600 11,000 10,100 8,900 11,000 10,000 30 29
30 / 15 300 800 11,600 11,000 10,100 8,900 14,000 13,000 30 29
30 / 18 300 800 11,600 11,000 10,100 8,900 17,000 16,000 30 29
XG 32 / 12 300 800 11,700 11,200 10,100 8,900 11,000 10,000 32 31
32 / 15 300 800 11,700 11,200 10,100 8,900 14,000 13,000 32 31

Samarium Cobalt (SmCo5)
Magnetic Material Characteristics

Download this data in PDF format – EAM-SmCo5-Properties.pdf – 58kb

Material and Grade *Max Op Temp (C) Curie Temp (C) Br (Gauss) Hc (Oersted) Hci (Oersted) Bhmax MGOe
MAX MIN MAX MIN MAX MIN MAX MIN
XG 18 / 18 250 750 8,900 8,300 8,600 8,000 18 17 18 17
18 / 20 250 750 8,900 8,300 8,600 8,000 20 18 18 17
18 / 25 250 750 8,900 8,300 8,600 8,000 26 25 18 17
XG 20 / 18 250 750 9,300 8,700 8,900 8,300 18 17 20 19
20 / 20 250 750 9,300 8,700 8,900 8,300 20 19 20 19
20 / 25 250 750 9,300 8,700 8,900 8,300 26 25 20 19
XG 22 / 15 250 750 9,900 9,300 9,300 8,700 15 14 22 21
22 / 18 250 750 9,900 9,300 9,300 8,700 19 18 22 21
22 / 20 250 750 9,900 9,300 9,300 8,700 20 19 22 21
XG 24 / 15 250 750 10,300 9,700 9,800 9,200 14 13 24 23
24 / 18 250 750 10,300 9,700 9,800 9,200 16 15 24 23

Charts & Data

Charts & Data

Samarium XG 26 20

One

Samarium XG 28 20

One

Samarium XG 30 15

One

Samarium XG 32 12

One

Samarium XG 18 25

One

Samarium XG 20 20

One

Samarium XG 22 20

One

Samarium XG 24 15

One
One
One
One
One
One
One
One
One

EAM-SamariumCobalt-MagnetizingStrengthCharts.pdf

Photos

Case Studies

Case Studies

Magnetically Actuated Emergency Alert System Read more

Anesthesia Equipment Needed a Better Magnetic Valve... Read more

Postage Machine Manufacturer / Advanced Injection Molding Read more

Magnetic Stirrer For Laboratory Equipment Manufacturer Read more

Controller For High-Tech Manufacturer Read more

Power Tool Manufacturer Read more

Tier 1 Commercial Automotive Supplier Read more

Critical Pump Mechanism for Heart & Lung Machine Read more

After-Market Magnetic 'Break-Away' Oil Filter Read more

A Magnetic Stirrer for the Food Industry Read more

Browse Standard Parts

Standard Sintered

Samarium DISK Magnets

Need a stock magnet for prototyping, design work, crafts or home projects?

We’ve made it easy to browse EAM’s standard parts and make purchases easily with a credit card. All orders ship direct from our NY or PA locations.

Just click to be redirected to EAM’s online magnet store:

Download this data in PDF format –EAM-Samarium-Disk-Magnets.pdf

Sintered Samarium Magnetic DISKS

EAM Part No.Outer Dia. (OD)ThicknessLift StrengthMGOeGradeMax Op. Temp. (C)FinishMachineable?Impact Resistance
RE-04490.125”0.125"0.33221 - 5250°NoPoorBuy
RE-04500.500”0.190"4221 - 5250°NoPoorBuy
RE-04510.250”0.100"0.6221 - 5250°NoPoorBuy
RE-04520.750”0.285"8221 - 5250°NoPoorBuy
RE-04530.250”0.100"2.8222 - 17250°NoPoorBuy
RE-04540.500”0.190"5222 - 17250°NoPoorBuy