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  1. Bfrost

    Annealing SS430 to maximize magnetic permeability

    MagMike, We would be looking for relative magnetic permeability of 600+ (this is what I saw on the paper). EdStainless, based on that, any thoughts on chemistry / heat treatment that should deliver that or above?
  2. Bfrost

    Annealing SS430 to maximize magnetic permeability

    So I've been doing a bunch of reading, and looks like permeability is affected by a number of factors. If I'm looking for material with permeability above a certain amount, what's the best way of specifying that to a supplier? I imagine most manufacturers don't measure permeability? Are there...
  3. Bfrost

    Annealing SS430 to maximize magnetic permeability

    Oh man...didn't know all these details since I'm not a metallurgist. I found the attached curve in a paper, realized it would work, and ordered 430 tubes. If we need to be specific about type of metal (like UNS number or other spect), any help would be much appreciated. Also, cost is a concern...
  4. Bfrost

    Annealing SS430 to maximize magnetic permeability

    Thanks guys. Unfortunately we didn't have a lot of options in terms of getting the tubes since we wanted small quantity and most places have large minimum orders for 430. A Chinese manufacturer had some in stock so sent us samples. I didn't realize even within the standard of "430" there could...
  5. Bfrost

    Annealing SS430 to maximize magnetic permeability

    Hi, I recently bought some SS430 tubes from China, expecting a certain magnetic permeability. However, the magnetic permeability seems very low when I tried using it as a core. Further research shows that the cold working involved in making it into a tube probably reduced its magnetic...

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