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Are charge materials affecting casting quality?
Nafziger RH; Farrell RF; Brynildson JE
Mod Cast 1984 May; 74(5):23-26
The foundry industry has expressed concern regarding the quality of scrap used to prepare iron castings owing to the growth of alloy steel production and its influence on tramp element levels when recycled. Reliable and current information is unavailable on the amount of tramp elements contained in iron castings produced over a significant period of time. Accordingly, the Bureau of Mines is analyzing over 50 cast iron samples from participating foundries throughout the United States on a quarterly basis under a memorandum of agreement between the Bureau and the American Foundrymen's Society. A direct-reading spectrograph and atomic absorption techniques provide the determination of 28 elements on each sample. The objective is to determine if the level of tramp elements in charge materials is changing over a period of time. Results to date indicate that the type of furnace used and the geographic location and size of the foundry did not significantly affect casting compositions. Owing to the variability of charge materials used, correlation of the analyses with charge compositions was unsuccessful. The data obtained thus far represent insufficient time to justify a statistical evaluation of possible trends.
OP; Journal Article
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Page last reviewed: November 12, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division