Dissimilar joints between ferritic steels and nickel alloys are used in many subsea applications, typically
without problems, but cracking at the interface may arise when hydrogen is present. The paper includes
the results of constant load, step load and slow strain rate tests on tensile specimens, with and without
notches, and slow strain rate fracture mechanics tests on notched bend specimens, all under cathodic
charging in simulated seawater. Specimens were taken from an 8630 forging welded with nickel alloy
625 and 725 consumables.