. The Iron and steel magazine. Fig. 20. Cu, 59%; Zn, 40%; Mn, 1%.Magnified 50 diam. Fig. 21. Cu, 54%; Zn, 40%; Mn, 6%.Magnified 50 Fig. 22. Cu, 65%; Zn, 30%; Mn, 5%.Magnified 200 diam. Fig. 23. Cu, 60%; Zn, 30%; Mn, 10%.Magnified 200 diam. published several photomicrographs of manganese brass. Al-though he does not indicate the chemical composition of thesealloys, the microstructure of ordinary brass is easily recognized, Copper Alloys 25 as further shown in Figs. 20 to 23. It will suffice to note thestructure of the brass containing 54 per cent copper and 5 percent, manganese and to co
. The Iron and steel magazine. Fig. 20. Cu, 59%; Zn, 40%; Mn, 1%.Magnified 50 diam. Fig. 21. Cu, 54%; Zn, 40%; Mn, 6%.Magnified 50 Fig. 22. Cu, 65%; Zn, 30%; Mn, 5%.Magnified 200 diam. Fig. 23. Cu, 60%; Zn, 30%; Mn, 10%.Magnified 200 diam. published several photomicrographs of manganese brass. Al-though he does not indicate the chemical composition of thesealloys, the microstructure of ordinary brass is easily recognized, Copper Alloys 25 as further shown in Figs. 20 to 23. It will suffice to note thestructure of the brass containing 54 per cent copper and 5 percent, manganese and to compare it with that of an ordinary brasscontaining 54 per cent copper and 46 per cent zinc. It wouldseem, therefore, that manganese merely takes the place of zinc,,producing a similar effect. The results shown in diagram 5were obtained by testing bars of brass containing originally54 per cent copper and 46 per cent zinc and in w^hich some of thecopper was replaced by manganese. To confirm these results two allovs were examined contain- bo 55So HSHO3SSoUS2o^5 ^0S ^ 1 ^^.—^_^_^ ?——^ . — \ II I I i_6 \pu 6 6,9s 9,5 9,53
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectiron, bookyear1898
