Question: ( 2 0 points ) The yield strength for a 7 0 C u - 3 0 Z n cartridge brass with an average grain

(20 points) The yield strength for a 70Cu-30Zn cartridge brass with an average grain
size of 10m is 150 MPa . At a grain size of 6m, the yield strength increases to 186
MPa. At approximately what grain diameter will the yield strength be 225 MPa ?
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( 2 0 points ) The yield strength for a 7 0 C u -

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