Price comparison of NdFeB, SmCo, SrFe or BaFe

[Clyde38]

Does anyone have a recent cost comparison of permanent magnets (as a finished product, not raw material prices)for NdFeB, SmCo and sintered ferrite (SrFe or BaFe)? A source for the information would be helpful. I would like to be able to determine what the price/(lb., kg, etc.) is for Neo, Samarium, and sintered ferrite.

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[MagMike]

At the Magnetics 2012 Conference this week there was a panel discussion and one of the participants put up a slide with the following information:
Based on simple magnet block shape, loose tolerances:
Hard ferrite: $3 to $20 per kg
Alnico: $50 to $100 per kg
SmCo: $120 to $160 per kg
NdFeB: $180 and up per kg

 

[Clyde38]

Hi MagMike,
Thanks for information. I was at this conference.

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[EdStainless]

Mike, Nd more than SmCo??
Sm is still more than Nd in terms of raw material prices, and that doesn't even include the Co.

Out of curiosity who is left producing Alnico in the US?

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[Clyde38]

EdStainless,

Sm may be more expensive than Nd, but the additives such as Dy (Dysprosium) is off the chart.

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[MagMike]

EdStainless:
Clyde nailed it. The cost for Dy shot up ten-fold last year. It is trending downward, but very slowly. Most NdFeB magnets contain some Dy. The higher the intrinsic coercivity, the higher the Dy content.

To my knowledge, there are only 3 US Alnico suppliers remaining:
Arnold
Thomas & Skinner
Permanent Magnet Company

-Mike

 

[EdStainless]

Thanks, As a T&S alum I was interested.

I had forgotten about Dy, it also improves (reduces) the temp coef.

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