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  1. #1
    Join Date
    Feb 2013
    Location
    Laidley, SE Qld
    Posts
    1,038

    Default No mess cast iron

    I repurposed an old cast iron hub from the scrap pile (post#143 in Tips and Tricks). I call it cast iron because it was definitely a cast item, it was ferrous, and there was a piece broken out of it typical of damaged cast iron. My past experience of turning cast iron is that I end up looking like an underground coal miner, but that wasn't the case with turning this hub.
    The metal was coming off the tool in a typical shower of tiny chips but they were clean, there was no horrible black dust.

    I'm thinking the hub must have been made from a low carbon cast iron. Or looking at it the other way a steel with extra carbon to lower the melting temp and increase the fluidity for casting, I have read of 'semi-steel cast iron' in advertising blurbs. Any thoughts?

    IMG_1991.jpg

    IMG_1992.jpg

  2. #2
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,439

    Default

    Hi Bob,

    Looking at those chips, I would say that was cast steel. The surface grain looks to fine to be iron.
    Best Regards:
    Baron J.

  3. #3
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

    Default

    The chips look the same as those I got from some 4E cast iron bar I machined recently, but the finish on the workpiece is much shinier.
    Chris

  4. #4
    Join Date
    Mar 2014
    Location
    South of Adelaide
    Posts
    1,225

    Default

    Looks like SG iron.

  5. #5
    Join Date
    Nov 2008
    Location
    Sydney
    Posts
    112

    Default

    I concur.

    Chas.

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