The Symposium on Elevated Temperature Properties as Influencedby Nitrogen Additions to Types 304 and 316 Austenitic StainlessSteels was presented at an informal workshop session held at the72nd Annual Meeting of the Society, in Atlantic City, N. J., 2227June 1969. The sponsors of this symposium included the JointCommittee on Effect of Temperature on the Properties of Metals,Metals Properties Council, American Society for Testing andMaterials, and American Society of Mechanical Engineers. J. J.Heger, U. S. Steel Corporation, and G. V. Smith, consultant, servedas co-chairmen.