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Nd · Pr · Dy · Tb · Sm

Understand the role of rare earths in NdFeB and SmCo magnets

Learn what roles neodymium, praseodymium, dysprosium, terbium and samarium play in permanent magnets and what information is important for an enquiry.

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Use the magnet material to distinguish NdFeB from SmCoStart with the magnet materialDistinguish between NdFeB, SmCo, coatings and composite materials.Rare earths as constituents of permanent magnetsFive magnet elementsUnderstand Nd, Pr, Dy, Tb and Sm within the material system.Documented magnet batch with nameplateIdentify the batchGather photographs, nameplate details, origin information and supporting documents.Segment magnets for a material enquirySubmit your lot for assessmentProvide the net magnet mass, shape and condition in sufficient detail for assessment.

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Sm · SmCo

Samarium in permanent magnets

Samarium is a key constituent of samarium-cobalt magnets. SmCo is a distinct magnet family and, for purchasing purposes, must be clearly distinguished from NdFeB, ferrite, AlNiCo and elemental samarium.

Role in the magnet

Understand samarium’s role in the material system

A specific proportion cannot be inferred from appearance, application or magnet grade.

01

Material system

SmCo

02

Function

Samarium is a key constituent of samarium-cobalt magnets. SmCo is a distinct magnet family and, for purchasing purposes, must be clearly distinguished from NdFeB, ferrite, AlNiCo and elemental samarium.

03

Material boundary

An SmCo magnet is not a batch of neodymium magnets, nor is it a lot of samarium metal or samarium oxide.

04

Evidence

Batch documentation, manufacturer data or suitable analysis must relate to the specific lot.

05

Weight

Total magnet mass, assembly mass and the mass of the individual element are different quantities.

06

Purchase assessment

Form, origin, condition, net magnet mass and potential recovery route are assessed first.

Further information about the element

Samarium as a metal, oxide or compound

The external specialist link covers material forms, properties and element-specific enquiry routes.

Samarium specialist page ↗

Other specialist areas

Relevant ES Metall specialist pages

For more detailed information about selling, recycling, rare-earth materials and prices we pay, visit the relevant ES Metall specialist pages.