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ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
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ASM International
Volume
2
ISBN electronic:
978-1-62708-215-0
Publication date:
1993
Book Chapter

Stress-Corrosion Cracking in Stainless Steel Heater Sheathing

By
P. Muraleedharan
P. Muraleedharan
Metallurgy Division, Indira Gandhi Centre for Atomic Research
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;
H.S. Khatak
H.S. Khatak
Metallurgy Division, Indira Gandhi Centre for Atomic Research
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;
J.B. Gnanamoorthy
J.B. Gnanamoorthy
Metallurgy Division, Indira Gandhi Centre for Atomic Research
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Published:
1993
Page range:
427 - 429

Abstract

Cracking occurred in type 304L stainless steel sheaths on nichrome wire heaters that had been in storage for about 5 years in a coastal atmosphere. The cracks were discovered when the heater coils were removed from storage in their original polyethylene packing materials and straightened for use. Fractography established that fracture occurred by stress-corrosion cracking. The cracks originated at rusted areas on the cladding that occurred under iron particles left on the surface during manufacture. High hardness values indicated that solution annealing following cold working had not been carried out as specified. It was recommended that the sheathing material be fully annealed and that the outer surface be pickled and passivated.

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P. Muraleedharan, H.S. Khatak, J.B. Gnanamoorthy, 1993. "Stress-Corrosion Cracking in Stainless Steel Heater Sheathing", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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