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  • 1.  Mechanical props of Cb7CU-1 forged.

    Posted 23 days ago

    Greetings everyone,

    We normally produce steel castings to ASTM, British, European standards. 

    The following chemistry and BHN is required to produce castings for coal crushing equipment. (Impact requirement).

    Chemistry %C 0.35, %Si 2.0, %Mn 0.7, %S 0.035, %P 0.035, % Cr 2.3, %Mo 0.3. Hardness requirement, 350 to 400HB.

    None of our normal steel production is produced with 2.00% Silicon. What effect will this level of silicon have on a typical anneal or normalize heat treatment cycle.

    What effect will this silicon level have on an oil quench and temper cycle requiring the BHN requirement. 

    Comment on the above will be much appreciated.

    regards, Brian Seviour.

      



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    Brian Seviour
    Mr
    BG Consulting
    Hartbeespoort
    (082) 416-2456
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  • 2.  RE: Mechanical props of Cb7CU-1 forged.

    Posted 23 days ago
    Is there an error in the title of this thread? Cb7CU-1 is a precipitation hardening stainless steel alloy.



    Dave Coulston



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  • 3.  RE: Mechanical props of Cb7CU-1 forged.

    Posted 23 days ago

    Silicon has a mild effect on hardenability and a moderate effect on annealability.

    Please see the attached two papers that I published on those subjects in the 1980s.

    Sincerely,

    John



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    John Tartaglia
    Senior Metallurgical Engineer
    Element Materials Technology Wixom Inc

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