SYMPOSIA PAPER Published: 01 January 1979
STP36879S

Effect of Heat Treatment and Microstructure on the Mechanical and Corrosion Properties of a Precipitation Hardenable Stainless Steel

Source

Custom 450 is a martensitic precipitation hardenable stainless steel. The strengthening mechanism during aging is attributed to precipitation of a very fine Laves phase. The precipitate was found to be relatively stable with respect to coarsening at aging temperatures above 811 K (1000°F). The aging reaction is accompanied by austenite reversion. The decrease in hardness and strength and increase in impact strength with increasing aging temperature and time when aging above 811 K are shown to be related to the increasing reverted austenite content of the alloy. Data are presented showing the effect of heat treatment on resistance to stress corrosion cracking. The relationship of cracking to toughness and general corrosion resistance is discussed.

Author Information

Kosa, T
Carpenter Technology Corporation, Research and Development Center, Reading, Pa.
DeBold, TA
Carpenter Technology Corporation, Research and Development Center, Reading, Pa.
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Details
Developed by Committee: E04
Pages: 367–381
DOI: 10.1520/STP36879S
ISBN-EB: 978-0-8031-4742-3
ISBN-13: 978-0-8031-0517-1