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An austenitized 70 mm diameter 4340 steel bar is quenched in agitated H2O. Predict what the...

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Mechanical Engineering

An austenitized 70 mm diameter 4340 steel bar is quenched inagitated H2O. Predict what the Rockwell C hardness of the bar willbe at (a) its surface, (b) 3/4-R, (c) midway between its surfaceand center and (d) at its center

(a) S:_53_____                     (b) 3/4R: __52_____ (c) MR: __52_____     (d)

C: __51____

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