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Samarium Cobalt Magnets Rectangle

Samarium Cobalt Magnets


- Very powerful
- High working temperature
- Extremely resistant to demagnetization
- Resistant to corrosion
- Most expensive
- Calculation Tools , including Flux Density and Pull Force Determination.

Samarium Cobalt Magnets DiskDisks in stock                       Samarium Cobalt Magnets RectangleRectangles in stock
Sintered Samarium Cobalt (SmCo) magnets fall into two groups of chemical composition: SmCo5 and Sm2Co17. Armstrong Magnetics has large range of stocked sized, including micro-sized, to choose from and accepts orders for custom Samarium Cobalt magnets as per customer design.

Samarium Cobalt magnets offer super combination of
extremely high magnetic standard, excellent thermal stability and distinguished corrosion resistance. Sm2Co17 is better than SmCo5 in all respects. Because of these merits, Samarium Cobalt magnets are ideal component specially in applications where temperature changes across a broad range or environment is corrosive, such as chemical pump couplings.

Samarium Cobalt magnets are extremely powerful
The (BH)max of Sm2Co17 is up to 30 MGOe and its Br up to11,000 Gauss.

Samarium Cobalt magnets have very high resistance to demagnetization
Maximum Hci of Samarium Cobalt magnets are as high as 25 KOe.

Samarium Cobalt magnets are suitable for heat applications
Reversible temperature coefficient is -.03 ~ -.0435 of Br/°C. Maximum working temperature is 250 ~ 300°C, under which Samarium Cobalt magnets maintain good magnetic property to temperature changing.

Samarium Cobalt magnets have outstanding resistance to corrosion
There is no need of surface treatment to Samarium Cobalt magnets even if they will work in humid environments.

Samarium Cobalt magnets are hard and brittle
It is not possible to machine Samarium Cobalt magnets with conventional machining. Samarium Cobalt magnets can be abrasively machined with coolant served to absorb heating and dust. Without coolant, rare earth magnets could crack and chip by the heat produced during high speed cutting or grinding, and the sparks contain the easily oxidized grinding dust that could cause fire!

Samarium Cobalt Properties

1. SmCo5 materials:

Grade Br (Gauss) Hc (Oe) Hci (Oe) (BH)max (MGO) Tw (Max Working Temp. ) (oF/oC) Tc (Curie Temp. ) (oF/oC) Br Temp Coef (%/oC) Hc Temp Coef (%/oC)
18 8,500-9,000 8,300-8,800 15,000-23,000 16-18 482/250 1,382/750 -0.05 -0.3
20 9,000-9,400 8,500-9,100 15,000-23,000 19-21 482/250 1,382/750 -0.05 -0.3
22 9,000-9,600 8,900-9,400 15,000-23,000 20-22 482/250 1,382/750 -0.05 -0.3
24 9,600-10,000 9,200-9,700 15,000-23,000 22-24 482/250 1,382/750 -0.05 -0.3

2. Sm2Co17 materials:

Grade Br (Gauss) Hc (Oe) Hci (Oe) (BH)max (MGO) Tw (Max Working Temp. ) (oF/oC) Tc (Curie Temp. ) (oF/oC) Br Temp Coef (%/oC) Hc Temp Coef (%/oC)
24 9,500-10,200 8,700-9,400 >18,000 22-24 572/300 1,472/800 -0.03 -0.2
26 10,200-10,500 9,400-9,800 >18,000 24-26 572/300 1,472/800 -0.03 -0.2
28 10,300-10,800 9,500-10,000 >18,000 26-28 572/300 1,472/800 -0.03 -0.2
30 10,800-11,000 9,900-10,500 >18,000 28-30 572/300 1,472/800 -0.03 -0.2
24H 9,500-10,200 8,700-9,400 >25,000 22-24 662/350 1,472/800 -0.03 -0.2
26H 10,200-10,500 9,400-9,800 >25,000 24-26 662/350 1,472/800 -0.03 -0.2
28H 10,300-10,800 9,500-10,000 >25,000 26-28 662/350 1,472/800 -0.03 -0.2
30H 10,800-11,000 9,900-10,500 >25,000 28-30 662/350 1,472/800 -0.03 -0.2

3. SmCo5 materials with Low Temperature Coefficient:

Grade Br (Gauss) Hc (Oe) Hci (Oe) (BH)max (MGO) Tw (Max Working Temp. ) (oF/oC) Tc (Curie Temp. ) (oF/oC) Br Temp Coef (%/oC)
10LTC 5,900-6,300 5,800-6,200 18,000-23,000 8.5-10 482/250 1,292/700 20-100oC: -0.004
100-200oC: -0.021
200-300oC: -0.042

4. Sm2Co17 materials with Low Temperature Coefficient:

Grade Br (Gauss) Hc (Oe) Hci (Oe) (BH)max (MGO) Tw (Max Working Temp. ) (oF/oC) Tc (Curie Temp. ) (oF/oC) Br Temp Coef (%/oC)
22LTC 9,400-9,800 8,400-9,000 15,000-20,000 21-23 572/300 1,544/840 -50-25oC: +0.005
20-100oC: +0.012
100-200oC: +0.006
200-300oC: -0.025