Steel manufacture, Allegheny-Ludlum. Pig iron such as this is a major ingredient of steel. Blast furnaces have smelted down the iron ore to obtain the pig iron used in all three types of steel furnaces: open hearth, Bessemer converter, and electric

Actual size of negative is C (approximately 4 x 5 inches).
Title and other information from caption card.
Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944.
More information about the FSA/OWI Collection is available at http://hdl.loc.gov/loc.pnp/pp.fsaowi
Film copy on SIS roll 30, frame 406.