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Broken Steel Casting with crystalized structure -- Root Cause

b_unruhly

Mechanical
Jul 16, 2024
5
TH
Hello,

We have a steel casting that has failed in a new way for me.

In the interior of the casting, there is a very apparant crystal structure. Much more dramatic than the "Rock Candy" fractures that I have studdied. it is also only on the interior of the cross section.

The part failed under tension, as it was being tourqued to spec. (40NM),

We are looking to identfy the root cause and corrective action.

Thank you,
 

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