The Symposium on Elevated Temperature Properties as Influenced by Nitrogen Additions to Types 304 and 316 Austenitic Stainless Steels was presented at an informal workshop session held at the 72nd Annual Meeting of the Society, in Atlantic City, N. J., 22—27 June 1969. The sponsors of this symposium included the Joint Committee on Effect of Temperature on the Properties of Metals, Metals Properties Council, American Society for Testing and Materials, and American Society of Mechanical Engineers. J. J. Heger, U. S. Steel Corporation, and G. V. Smith, consultant, served as co-chairmen.