How can you ID a Magnet? (EG: Alnico, Stontiumm, Neodymium etc..)

Discussion in 'Archived Threads 2001-2004' started by Brett DiMichele, Feb 4, 2003.

  1. Brett DiMichele

    Brett DiMichele Producer

    Sep 30, 2001
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    Hey Gang,

    I bought a stack of magnets off a co worker/friend of mine
    he got them at an auto parts meet years ago. They are 1/2"
    Diameter by 1/8" Thick and have 5 pounds worth of pull each!
    I know Neodymium is ceramic and these feel like a ferrous
    Magnet so I guess that rules out Neo.. Could they be Alnico?

    I bought 12 of them and was going to use them to hold the
    grills on my DIY speakers in the future. But I am thinking
    hell if I use these I won't be ABLE to get the grills off!
    It takes all I got, just to pull them apart!

    (Hmm Could I make a Hoverboard?) [​IMG]
  2. David-S

    David-S Second Unit

    Mar 18, 2001
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    Keep in mind that with longer distance between the magnets, they'll have less pull, so if you have MDF between them, they'll be easier to pull apart...
  3. Bill Fagal

    Bill Fagal Stunt Coordinator

    Jul 8, 2002
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    Sounds like Neodymium.

    If they are ground smooth with fine corners or are nickle or epoxy plated, they're probably Nd.

    Alnico is usually a raw casting with minimal surface grinding. At least that's my experience.

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