SPECIAL REPORT: Study calls for pipeline filler metal improvement

Filler metals for 36Ni alloy cryogenic pipeline construction need further refining to obtain overmatching mechanical properties relative to the base metal.This article provides an overview of mechanical properties for commercially available filler metals for 36Ni alloy construction, helping determine loading limits and performance capabilities of the various filler metals available. Two of the alloys tested meet the specified property values, but none overmatched both the tensile and impact properties of the base metal at room and cryogenic temperature.BackgroundOperators of LNG loading terminals want to change loading pipeline design from the standard jetty-based stainless steel to a sub...

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