Ethylene production by pyrolysis, coal gasification, and generation of process heat from high temperature nuclear reactors for direct iron ore reduction, cement making and other thermally intensive processes will require in the future alloys beyond the capabilities of HK-40 and all other commercially available alloys. The properties of IN-8000, a new alloy that has been developed in an attempt to meet these requirements, will be reported here. IN-8000 is a Ni-Cr-Fe-Al-Si type casting alloy having approximately a 10fold improvement in hot corrosion resistance, e.g., carburization resistance, over HK-40. The rupture strength of IN-8000 is similar to that of HK-40. The creep strength is slightly lower at intermediate temperatures and approximately equal to HK-40 at 1093° C (2000°F). Satisfactory air melt practice has been developed for IN-8000 heats, which show excellent sand castability, and the alloy has good microstructural stability and useful weldability. Scale-up trials at a commercial foundry indicate that IN-8000 is amenable to commercial production.

Subject
Stability, Carburization, Carbides, Corrosion resistant alloys, Composition, Nickel based alloys, Commercial alloys, Weldability, Heat, Zirconium alloys, Corrosion resistance, Titanium alloys, Alloys
© 1984 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1984
Association for Materials Protection and Performance (AMPP)
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