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ASM Handbook

Heat Treating of Irons and Steels

Edited by
Jon L. Dossett
Jon L. Dossett
Consultant
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George E. Totten
George E. Totten
Portland State University
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ASM International
Volume
4D
ISBN electronic:
978-1-62708-168-9
Publication date:
2014
Book Chapter

Heat Treated High-Alloy Steels

Published:
2014

Abstract

Ferritic stainless steels are essentially chromium containing steel alloys with at least 10.5% Cr. They can be grouped based on their chromium content: low chromium (10.5 to 12.0%), medium chromium (16 to 19%), and high chromium (greater than 25%). This article provides general information on the metallurgy of ferritic stainless steels. It describes the two types of heat treatments- annealing and stress relieving, which are used to avoid sensitization and embrittlement. The article also provides information on casting and stabilization of ferritic stainless steels to avoid precipitation of grain boundary carbides.

Abstract

This article provides information on the metallurgy of austenitic stainless steels, and the formation of their intermediate phases (Sigma, Chi, and Laves). It discusses sensitization, a major problem associated with the austenitics, and solutions to avoid the problem. The article describes heat treatments applied to austenitic stainless steels, namely, soaking for homogenization and preparation for hot working; annealing to remove the effects of cold work and to put alloying elements into solid solution; and stress relieving. It provides information on the stabilizing anneal process, which is conducted on stabilized alloys, and discusses the metallurgical characteristics of austenitic stainless steels that may affect the selection of a stress-relieving treatment and prevention of stress corrosion by stress relieving. The article also discusses the heat treatments applied to duplex stainless steels, which involve soaking and annealing, achieving the austenite-ferrite balance, precipitation of intermetallics, and alpha prime precipitation.

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2014. "Heat Treated High-Alloy Steels", Heat Treating of Irons and Steels, Jon L. Dossett, George E. Totten

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