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MACMILL Magnets Co.,Ltd.

SmCo  magnet is a high performance, low temperature coefficent permanent magnet made of samarium and cobalt and other rare-earth elements. Its biggest advantage is its high working temperature---350 degree centigrade. It needn't to be coated because it is difficult to be eroded and oxidized. SmCo magnet is widely used in motors, watch, transducers, instruments, positional detector, generators, radar and etc.

 

Magnetic Characteristic:

Materials Code Remanence Coercivity force Intrinsic Coercivity force Max. energy product Curie temp. Max. operating temp.
Br bHc iHc (BH)max TC TW
T KGs KA/m KOe KA/m KOe HJ/m3 MGOe ºC ºC
SmCo
(1:5)
YX-18 0.85 8.5 620 7.8 ≥1350 ≥17 145-150 17-19 750 250
YX-20 0.90-0.96 9.0-9.6 653-717 8.2-9.0 1194-1513 15-19 150-175 19-22 750 250
YX-24 1.0 10.0 680 8.5 ≥1195 ≥15 175-190 22-24 750 250
YX-26 1.02 10.2 750 9.5 ≥1195 ≥15 195-215 24-26 750 250
SmCo(2:17)
YXG-24 0.95-1.02 9.5-10.2 637-732 8.0-9.2 1433-1990 18-25 175-190 22-24 800 300
YXG-26 1.02-1.05 10.2-10.5 748-796 9.4-10.0 1433-1990 18-25 195-215 24-26 800 300
YXG-28 1.05-1.08 10.5-10.8 756-796 9.5-10.0 1433-1831 18-23 205-220 26-28 800 300
YXG-30 1.08 10.8 780 9.8 ≥955 ≥15 220-240 28-30 800 300

 


Physical Property:

  Temperature Coefficent of Remanence(%/℃) Curie Temperature(℃) Density
(g/cm3)
Vickers Hardness(HV) Max. Working temperature(℃)
SmCo5 -0.05 700-750 8.2-8.4 450-500 250
SmCo17 -0.03 800-850 8.3-8.5 500-600 300

 

Production Process:
Raw Materials → Burdening → Melting → Milling →Pressing Sintering & Tempering →Pre-inspection → Machining → Inspection →Packing

Size available.
The largest size:
disk:dia100x50mm ring:dia100-90x50mm block:100x100x50mm

The smallest size:
disk:dia1.5x0.5mm ring:dia2.8-1x0.5mm block:3x2x1mm

Note:
The advantages of SmCo magnet is its resistibility to rust and can work at a higher temperature, so SmCo magnet usually need not any plating. You must be careful to SmCo magnets when you assemble them due to it is very brittle.

SmCo plastic bonded magnet is made by grinding sintered SmCo magnets. SmCo powder is mixed with resin and molded like Nd-Fe-B plastic bonded magnet and has been produced without secondary processing. For it has high resistance to orrosion, it is free of coating.

Bonded
SmCo(1:5) Yb-6 0.4 4.0 280 3.5 800 10 30-50 4-6 / 120
Yb-10 0.5 5.0 320 4.0 800 10 50-65 6-8 / 120
SmCo(2:17) YbG-10 0.6 6.0 360 4.5 800 10 65-80 8-10 / 120
YbG-12 0.7 7.0 400 5.0 800 10 80-95 10-12 / 120

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