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Developing Additively Manufactured Alloy UNS N07718 for Critical Oilfield Applications

Additively Manufactured Alloy UNS N07718 (AM 718) has been increasingly adopted for components in oilfield applications. AM 718 fabricated using laser powder bed fusion (LPBF) has demonstrated not only excellent mechanical performance, but also promising capabilities in critical services such as sour or hydrogen-generating conditions. In oilfield applications, it is generally felt that AM 718 should comply with API standard 20S4, and align with the requirements for wrought 718 in API 6ACRA.

Product Number: 51323-19220-SG
Author: Wei Chen, Thomas Dobrowolski, Paul Agosta, Nicholas Barta, Lakshmi Vendra, Juan Carlos Flores
Publication Date: 2023
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$20.00
$20.00

Additively Manufactured (AM) Alloy UNS(1) N07718, specifically using Laser Powder Bed Fusion (LPBF), has been increasingly adopted for components in oilfield applications. However, there is uncertainty of the differences in properties between AM (interchangeable with LPBF herein) 718 and wrought oilfield API 6ACRA 718 material used in sour or hydrogen-generating conditions. Recent literature has shown promising results in mechanical properties and sour performance for AM 718, but certain technology gaps persist. This paper shows results of mechanical and corrosion testing of AM 718 after API 120K solution and age hardening heat treatment. Equivalence to wrought API 6ACRA 718 120K was achieved in mechanical properties and corrosion performance in sulfide stress cracking (SSC) and hydrogen induced stress cracking (HISC) tests.

Additively Manufactured (AM) Alloy UNS(1) N07718, specifically using Laser Powder Bed Fusion (LPBF), has been increasingly adopted for components in oilfield applications. However, there is uncertainty of the differences in properties between AM (interchangeable with LPBF herein) 718 and wrought oilfield API 6ACRA 718 material used in sour or hydrogen-generating conditions. Recent literature has shown promising results in mechanical properties and sour performance for AM 718, but certain technology gaps persist. This paper shows results of mechanical and corrosion testing of AM 718 after API 120K solution and age hardening heat treatment. Equivalence to wrought API 6ACRA 718 120K was achieved in mechanical properties and corrosion performance in sulfide stress cracking (SSC) and hydrogen induced stress cracking (HISC) tests.

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