Metallurgical Principles and Practice of Engineering (PE) Study Guide: Question #37

It Is the Policy of The Minerals, Metals & Materials Society (TMS) to Encourage the Professional Registration of Metallurgical Engineers.
Stainless steel is "sensitized" when a precipitate is formed at grain boundaries, changing some of the properties of the material. Stainless steels will become sensitized in varying amounts; some not at all. Type 304 is an example of a stainless steel that will become sensitized. Assume that heat treatments are maintained at temperature for one hour per inch (25 mm) of section thickness.

Which of the following thermal-mechanical treatments will remove the sensitized condition from 304 stainless steel?

(A)	Cold work 20%
(B)	Heat to 1850°F (1010C), quench
(C)	Heat to 1200°F (650C), slow cool
(D)	Cold work 20%, heat to 1200°F (650C), quench

The information on this page is maintained by the Nellie Luther (natale@tms.org).

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