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  • 1.  Ductile Iron CTE

    Posted 03-06-2023 09:40

    Does anyone know where I can find coefficient of thermal expansion values for A395 Grade 60-40-18 cast ductile iron and A216 Grade WCB carbon steel?



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    John Merrill
    Principal Engineer
    EagleBurgmann
    Matthews NC
    7048407045
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    IMAT Conference & Expo


  • 2.  RE: Ductile Iron CTE

    Posted 03-07-2023 11:10

    John,

    Alloy Digest, now in the ASM Digital Library, has a datasheet for:

    DURA-BAR 60-40-18: Ductile Iron. Alloy Digest 1 October 2021; 70 (10): CI–86. doi: https://doi.org/10.31399/asm.ad.ci0086

    The sheet includes the following entry for CTE:

    Coefficient of linear thermal expansion at RT to 100 °C (RT to 212 °F), 11.5 10–6/K (6.4 10–6/°F).

    I found some property data for A216 Grade WCB in the ASM Digital Library, but did not find CTE.

    Scott



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    Scott Henry
    Senior Content Engineer
    ASM International
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    Original Message
    IMAT Conference & Expo


  • 3.  RE: Ductile Iron CTE

    Posted 03-07-2023 11:55

    Excellent, thank you Scott!



    ------------------------------
    John Merrill
    Principal Engineer
    EagleBurgmann
    Matthews NC
    7048407045
    ------------------------------

    Original Message
    IMAT Conference & Expo


  • 4.  RE: Ductile Iron CTE

    Posted 03-08-2023 12:56
    Regarding the A216 gr WCB, that's as generic a carbon steel as one can find, so I'd just use some handbook value for "steel", low to medium carbon.  Alloying elements are limited to ensure weldability.  I never did run into a situation where a couple of percent difference in CTE was that important, as uniformity of temperature in a heated part can vary depending on the method of heating, environment, etc.
    Regards,   Paul T.



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