TP033 - The Development of an Ultra-high Strength Cupronickel Alloy for Offshore Use
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Hiduron® 220 is significantly less sensitive to hydrogen embrittlement than other alloys used for similar marine fastener applications.

The paper summarises testing of Hiduron® 220 for hydrogen embrittlement fracture, subjecting samples to static loading at known percentages of 0.2% proof stress in the presence of hydrogen sulphide.

Graph plotting hydrogen embrittlement susceptibility against stress for several named alloys