Because the foundry industry has expressed concern over the possible deterioration of ferrous scrap used as charge material for ironmaking and steelmaking, the Bureau of Mines contracted with Battelle's Columbus Laboratories to determine the extent of the problem and what might be done. Data obtained from the literature, scrap processors and brokers, practicing foundry operators, and trade associations indicate no substantial evidence to support the thesis that the quality of purchased ferrous scrap available to foundries is expected to decline significantly during the next decade. Tramp elements already present will continue to be present in purchased scrap, with b, cr, pb, and sb in iron and sb, p, and s in steel being of most concern. Continuing lot-to-lot variation will make quality control by foundries increasingly important. Foundries and their suppliers of purchased scrap have the potential to control tramp elements within practical limits. Costs will increase in the long term owing to increased demand for premium grades of scrap, necessary upgrading of scrap to maintain low-tramp levels, and increased expenses to control tramp elements.
Am. Foundrymen's Soc. Trans., V. 90, 1982, PP. 811-819