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A program was planned to obtain quantitative information on the effects of residual impurity elements on the reversible temper embrittlement susceptibility of Ni-Cr-Mo-V rotor steels. The statistical design of the experiment and statistical analysis of the data are described. The basic design was a supplemented ½ fraction of a 2 factorial to study the effects of P, Mo, Sn, As, and Sb, including 2-factor interactions among these elements.
embrittlement, tempering, transition temperature, design, statistical analysis, statistical distributions, statistical tests, evaluation, mathematical models, steels, arsenic, antimony, phosphorus, molybdenum, tin
Senior research statistician, Applied Research Laboratory, U.S. Steel Corp., Monroeville, Pa.