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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Standard: 593 Capture method: Kalling Etched Macro clear all

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Macrography of the longidutinal section of a non broken allen bolt, at the threaded body to bolt head transition. The granular structure is different through the bolt, with refined structure in the threaded body and coarse at the transition.
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ML00139 / Jun.2018
Hydrogen Fracture of a 17-4 PH Allen Bolt
M - Precipitation Hardened Stainless SteelP - Allen BoltAp - SubseaCd - Hydrogen Embrittlement
Cm - Kalling Etched MacroDf - Longitudinal Section