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Economics leads to the use of certain raw materials and melting practices in the production of the austenitic stainless steels, thereby establishing an acceptable “normal” level of residuals. This paper classifies the numerous residual elements which have been encountered in these steels, giving some concept of their characteristics as far as melting operations are concerned. These elements get into the steel from such sources as refractories, furnace contamination, home and purchased scrap, alloying materials, and fluxes. Many are influenced by the melting practice. To deviate from current raw material sources and melting practices in order to accommodate a more restrictive requirement with respect to certain residual elements can be very costly. Modern vacuum treating units may be helpful in controlling some of the residual elements.
residual elements, austenitic stainless steels, stainless steels, electric arc furnace, melting, scrap, contamination, raw materials, metal scrap, refractories
Goller, G. N.
Manager, Armco Steel Corp., Baltimore, Md.