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This paper is a discussion of the methods and devices used in testing the acceptability of sintered iron rotating bands, which are made by the powder metallurgy technique from commercial grades of iron powder. A state of urgency exists in the supply of copper available for the total military and civilian economy. For the third time in less than 50 years, the end uses of copper must be restricted to those where the combined physical or chemical properties, exclusive in copper, are most completely utilized. Several effective substitute materials are being developed to replace copper and gilding metal rotating bands, and among them is low-density sintered iron.
Dale, J. D.
President, Charles Hardy, Inc., New York, N. Y.