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2018 | OriginalPaper | Chapter

High Performance New Ni-Base Alloy AF955 (AF955) for Oil and Gas Industry

Authors : Luca Foroni, Louis Lherbier, Carlo Malara

Published in: Proceedings of the 9th International Symposium on Superalloy 718 & Derivatives: Energy, Aerospace, and Industrial Applications

Publisher: Springer International Publishing

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Abstract

A precipitation hardened Ni-base alloy has been developed to fulfil the recent stringent requirements of the oil and gas industry. The new alloy is commercially designated as AF955 and the Unified Numbering System (UNS) assignment of N09955. The new alloy is patented and accepted for inclusion in NACE MR0175/ISO 15156. It is produced at strength levels of 827 MPa (120 ksi) 0.2% offset minimum yield strength (MYS) and 965 MPa (140 ksi) MYS with very good ductility and toughness, and with a microstructure characterized by fine γ′ and γ″ strengthening precipitates, uniform and equiaxed grain size distribution, minimized secondary phase precipitation and free of continuous grain boundary precipitates. It exhibits good corrosion resistance and low susceptibility to hydrogen embrittlement. These properties make alloy AF955 a very promising material for widespread applications from oil and gas industry to power generation, chemical applications and many others. Details of the manufacturing process and properties of AF955 are presented and discussed in this paper.

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previous chapter Corrosion and Carburization Behaviour of Ni-Cr-Mo-Nb Superalloys in a High Temperature Supercritical-CO2 Environment

next chapter Hydrogen Influence on Crack Propagation and Stress-Strain Evolution of Alloy 718

API Standard 6ACRA—First Edition Age-hardened nickel-based alloys for oil and gas drilling and production equipment, API Publishing Services, Washington D.C., NW

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Title: High Performance New Ni-Base Alloy AF955 (AF955) for Oil and Gas Industry
Authors: Luca Foroni
Louis Lherbier
Carlo Malara
Publisher: Springer International Publishing
Book: Proceedings of the 9th International Symposium on Superalloy 718 & Derivatives: Energy, Aerospace, and Industrial Applications
Print ISBN: 978-3-319-89479-9

Electronic ISBN: 978-3-319-89480-5

Copyright Year: 2018
DOI: https://doi.org/10.1007/978-3-319-89480-5_11

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