Use of Haynes Alloy 230 for Supercritical Water Reactors

Abstract

Several high nickel content super alloys are commonly used as materials of construction for supercritical water reactors due to their oxidative resistance and mechanical properties. Two common alloys are Hastelloy C276 and Inconel 625 and have been used in multiple research projects involving supercritical water and supercritical water oxidation at conditions as severe as 650°C at 5000 psig and 710°C at 3500 psig. the yield strengths and tensile strengths of both Hastelloy C276 and Inconel 625 Grade 1 are relatively constant over a broad range of temperatures, but rapidly drop off at higher temperatures and as such, these alloys are not suitable as a material for supercritical water reactors at 800°C Haynes Alloy 230 is an alloy designed for high temperature applications in oxidative environments. It has higher yield and tensile strength than Hastelloy C276 and higher tensile strength than Inconel 625 Grade 1 at 800°C, making it a more suitable material of construction for high temperature supercritical water reactors. This paper discusses the performance of Haynes Alloy 230 in comparison to Hastelloy C276 and Inconel 625 for supercritical water applications.

Department(s)

Chemical and Biochemical Engineering

International Standard Book Number (ISBN)

978-081691022-9

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 American Institute of Chemical Engineers, All rights reserved.

Publication Date

01 Dec 2007

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