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Alloy banding

  • 1.  Alloy banding

    Posted 02-24-2021 14:23
    We call out alloy banding and microsegregation acceptance per NADCA #229-2011 in our material specifications for tool steels.  Some of our steel suppliers are questioning this saying they never see this call out from their other customers.  We are not in the die making industry but we use tool steel widely for our components.  Does anyone have any recommendations regarding this?  Thank you.​

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    Sree Menon
    Interstate-McBee, LLC
    Cleveland OH
    2168810015
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  • 2.  RE: Alloy banding

    Posted 02-25-2021 02:52
    Great practice! You're doing it right - we've seen way too many failures from poorly made steels where those are the culprits. I often recommend similar requirements for our customers. If you want more info, contact me at josh@uscorrosion.com

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    Joshua Jackson
    CEO
    US Corrosion Services LLC
    Houston TX
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  • 3.  RE: Alloy banding

    Posted 02-25-2021 06:08
    Your specification is right, especially since tool steels have a low fracture toughness; you do not want that fracture toughness is further lowered by banding or segregations if the principal stress is normal to these features.

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    Donato FIRRAO FASM
    Professor
    Politecnico di Torino
    Torino
    +393351494032
    Italy
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  • 4.  RE: Alloy banding

    Posted 02-26-2021 08:29
    When and where is the next Tooling conference in Europe

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    Mark Baleja
    Kind Special Alloys
    Traverse City MI
    (231) 946-0020
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  • 5.  RE: Alloy banding

    Posted 02-25-2021 10:50
    Why don't you use ASTM E1268 for assessing the degree of banding within the microstructure? I have not read NADCA #229-2011 standard, but it would be interesting to know if it is similar to the ASTM one.


    Thanks,
    Riyadh Salloom, PhD​

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    Riyadh Salloom
    Arlington TX
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  • 6.  RE: Alloy banding

    Posted 02-25-2021 16:36
    Thank you all for your valuable suggestions.  I am not familiar with ASTM E1268 but I will look it up.  Thank you again. 

    Regards,
    Sree.

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    Sree Menon
    Vice President, Engineering
    Interstate-McBee, LLC
    Cleveland OH
    2168810015
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  • 7.  RE: Alloy banding

    Posted 02-26-2021 08:28
    NADCA's / North American Die Casting Association's specification is detailed and will result in consistent high quality H-13 steel.  The major H-13 makers all are very aware of the standard.  You don't have to call out the testing portion of the specification which can be expensive, just ask that the steel meets the specification.

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    Mark Baleja
    Kind Special Alloys
    Traverse City MI
    (231) 946-0020
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