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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
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Book Chapter

Failure of a Cast Steel Crane Bolster

Alan Stone
Alan Stone
Aston Metallurgical Services Co., Inc.
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Page range:
440 - 442


The failure of a 45 Mg (50 ton) rail crane bolster was investigated. Spectrochemical analysis indicated that the material was a 0.25C-1.24Mn-0.62Cr-0.24Mo cast steel. SEM examination revealed the presence of fatigue, as well as intergranular and ductile fractures. Microstructural analysis focused on an area where an antisway device had been welded to the structure and revealed the presence of coarse, untempered martensite that had resulted from faulty weld repair techniques. It was suggested that the use of proper welding procedures, including preheating and postheating, would have prevented the failure.

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Alan Stone, 1992. "Failure of a Cast Steel Crane Bolster", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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