High‐Temperature Steels and Alloys for Gas Turbines

A Survey of the Development of Creep‐resisting Alloys: N. P. Allen (Superintendent of the Metallurgy Division of the National Physical Laboratory, Teddington). Official summaries of the papers presented at the Symposium held by the Iron and Steel Institute at the Institution of Civil Engineers on February 21 and 22, 1951. The development of creep‐resisting alloys, both ferritic and austenitic, in the period between the two wars is briefly described, and a rather more detailed account is given of the general trend of the researches undertaken after 1939 in Great Britain, America, and Germany to provide improved materials for use in gas turbines. The properties of alloys that were relied upon in each country are described in terms of the stresses giving plastic deformations of the order of 0.1 per cent in 1,000 hr. (FIGS. 1, 2, 3).