During recent years, a number of plans for the development and sale of rigid metal containers made of materials other than tin plate have been publicly stated. While dealing primarily with the use of aluminum alloys, these announcements (1, 2, 3, 4) reflect general interest since World War II in the development of metal cans made from tin-free materials which would replace or compete with tin plate cans. This discussion will review within the limitations of space and time the progress made in this over-all field and, in particular, indicate the major engineering and economic problems which attend this development area.

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