Research Papers

Creep-Rupture Strength of Austenitic Cr-Ni-Mo Steels in Sheet and Bar Form

[+] Author and Article Information
G. V. Smith

Department of Metallurgical Engineering, Cornell University, Ithaca, N. Y.

F. Garofalo, R. W. Whitmore, R. R. Burt

U. S. Steel Corporation Research Center, Monroeville, Pa.

J. Basic Eng 81(4), 610-616 (Dec 01, 1959) (7 pages) doi:10.1115/1.4008573 History: Received August 04, 1958; Published December 01, 1959; Online February 20, 2019


Creep-rupture tests at 1100, 1300, and 1500 F on seven bar-stock and seven sheet-stock, 18 Cr-8 Ni-Mo steels show that small variations in C, N, and P measurably influence both 100 and 1000-hr creep-rupture strength. Variation in amounts of C, N, and P accounts for at least one third of the variability in creep-rupture strength. The additional variability may be related to differences in thermal and mechanical history and in the inherent variability in creep-rupture testing. The bar-stock steels are slightly stronger at 1100, 1300, and 1500 F for rupture in 100 hr and at 1300 and 1500 F for rupture in 1000 hr. At 1100 F, essentially no difference is found between bar and sheet steels for the 1000-hr rupture strength.

Copyright © 1959 by ASME
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