Public domain
Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Quality in the manufacture of steel requires constant control and research. This chemist is weighing the elements of a steel alloy to determine its exact composition. Analysis is determined to 1/1000 of 1 percen
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Credit lineSteel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Quality in the manufacture of steel requires constant control and research. This chemist is weighing the elemen. 1940-01-01. United States. Office Of War Information, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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