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  1. #1
    Moderator mike536's Avatar
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    Type of Stainless Steel

    I was wondering what type of stainless steel that impellers (Spelling) are made of (You know like the ones that are out of Maxi jets or 802's). I'm thinking of doing a Mod to something and I need to know what type of stainless they are made of. I didn't realize that there were so many types of stainless steel until I went into one of the metal books at work and tried to order some. Any info would be great.
    Cheers,
    Mike Philpott

  2. #2
    Moderator ShipWreck's Avatar
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    It is probably a 316 stainless steel. But on top of the many types of stainless you will find is also the surface ruffness that will matter. Standard 316 can be below the water line in normal water without issues, but in saltwater you will require a near perfect surface finish (no roughness) to keep it from pitting.

    The roughness I refer to is something you could not measure with any standard tool.
    Rob
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    Upgrade in the works! Keep looking for an update.


  3. #3
    Senior Member Bonaqua's Avatar
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    You can go to www.mcmaster.com
    You can browse through stuff they have.
    They carry diferent grades and different finishes.
    I was looking into their aluminum and stainless steel sheets for reflectors.
    If you get the high resistance SS after you do what ever you do with it, it would be good to passivate the piece.
    Passivation gets rid of damaged molecules off the surface.
    The molecules cut by machining the piece. Any of those molecules are weak spots against corrosion.

  4. #4
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    I would bet that anything that is FOOD contact quality stainless steel will do the job.
    Rob

  5. #5
    Senior Member Bonaqua's Avatar
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    McMaster-Carr carries "marine Grade" metals.
    That should be very resistive.

  6. #6
    Moderator mike536's Avatar
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    awesome thanks everyone.
    Cheers,
    Mike Philpott

  7. #7
    Moderator mike536's Avatar
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    Well I got the steel ordered today. Can't wait to get it. Now I'm wondering if anyone know where to get little propellers. Little plastic ones for RC boats?
    Cheers,
    Mike Philpott

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