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Predict the hardness (DPN) of a plain-C steel that has been hardened and the tempered for 1.5 hrs. at 700F. The composition of the steel
Predict the hardness (DPN) of a plain-C steel that has been hardened and the tempered for 1.5 hrs. at 700F. The composition of the steel (in wgt. \%) is 0.40C,0.20Si and 0.40Mn
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