ABSTRACT
Dissimilar metal butter-welded joints are commonly used by the oil and gas industries as they allow a welded connection between high strength hardenable carbon forged steel or non-hardenable pipe line steel to Nickel alloy components. A series of catastrophic failures of AISI 8630 steel/IN625 Nickel alloy dissimilar-metal welds highlighted the need for further investigations on the role of hydrogen on the fracture process of the components (Fenske 2010).
