BEIJING S.W. MAGNETS CO., LTD BEIJING S.W. CASTING CO., LTD
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Rare Earth Magnets
 

  -> Most powerful
  -> Extreme resistance to
  -> demagnetization
  -> Hard and brittle

  The rare Beijing S.W. Magnets supply are Neodymium Iron Boron and Samarium Cobalt.
  These rare earth magnets are manufactured in metallurgical process. Powder of rare earth elements and some transition metal are melt, alloyed, crushed, milled, pressed and meanwhile magnetically orientated. After pressed, the rare earth magnets are sintered, heat treated and ground to final dimensions.
  Rare earth magnets are extremely powerful per volume, thus miniaturization could be achieved by using rare earth magnets in industrial or consumer applications.
  Rare earth magnets have extraordinarily high Hci Intrinsic coercive force, they are good to be used as magnetic repelling component in motors, and similar applications.
  Unfortunately, Neodymium magnet has high Reversible temperature coefficient(-.009 to-.13% per oC and low Tmax Maximum service temperature(150oC for N35 grade for example), so it can not work stably at high temperature. Another imperfection, Neodymium is that it is prone to oxidized corrosion and needs to be protected by coating for long term use. Whereas, Samarium has premium behavior in above said environments. It performs well up to 500oC and it has no rusting problem.
  Rare earth magnets are brittle and 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!
  Beijing S.W. Magnets stock rare earth magnets in popular shapes and sizes for immediate delivery and custom make rare earth magnets as per customers' needs.
  Rare earth magnets are strongest magnetic materials available today in the world! Its name "rare earth magnets" comes from the Rare Earth Elements, such as Neodymium, Samarium and others, which are contained in the chemical composition of rare earth alloys.
  The rare Beijing S.W. Magnets supply are Neodymium Iron Boron and Samarium Cobalt.
  These rare earth magnets are manufactured in metallurgical process. Powder of rare earth elements and some transition metal are melt, alloyed, crushed, milled, pressed and meanwhile magnetically orientated. After pressed, the rare earth magnets are sintered, heat treated and ground to final dimensions.
  Rare earth magnets are extremely powerful per volume, thus miniaturization could be achieved by using rare earth magnets in industrial or consumer applications.
  Rare earth magnets have extraordinarily high Hci Intrinsic coercive force, they are good to be used as magnetic repelling component in motors, and similar applications.
  Unfortunately, Neodymium magnet has high Reversible temperature coefficient(-.009 to-.13% per oC and low Tmax Maximum service temperature(150oC for N35 grade for example), so it can not work stably at high temperature. Another imperfection, Neodymium is that it is prone to oxidized corrosion and needs to be protected by coating for long term use. Whereas, Samarium has premium behavior in above said environments. It performs well up to 500oC and it has no rusting problem.
  Rare earth magnets are brittle and 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!
  Beijing S.W. Magnets stock rare earth magnets in popular shapes and sizes for immediate delivery and custom make rare earth magnets as per customers' needs.


MAGNETIC PROPERTY OF NEODYMIUM MAGNETS

Grade

Br (Gauss)

Hc (Oe)

Hci (Oe)

(BH)max (MGO)

Max Working Temp. ( <C / <F)

35

11,700 C 12,100

>10,900

>12,000

35

80 / 176

40

12,500 C 12,800

>10,500

>12,000

40

80 / 176

35H

12,500 C 11,700

>11,000

>17,000

35

120 / 245

35SH

11,700 C 12,500

>11,000

>20,000

35

150 / 300

 
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