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  1. bobkyker

    4130 cr vs 4340 forged

    I would like to compare the use of a (1) pump crankshaft fabricated (welded) with a 4130 cold rolled steel shaft and 4130 cold rolled lobes; to a (2) pump crankshaft (welded also) with a 4340 forged shaft and 4340 forged lobes. both cranks stress relieved.

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