The changing material demands in the chemical processing and related industries calls for new and more performing materials. UNS N08034 is a new super-austenitic stainless steel alloyed with about 27 % chromium and 6.5 %-molybdenum. Further it has an intended addition of nitrogen for austenite stability and strength.

The aim of this work is to present a comprehensive characterization of this material, which is the best in class in the corresponding alloy group, and therefore of high interest for applications in severe corrosive environments of the process industry. Along with the main material properties such as chemical composition, microstructure, mechanical properties, thermal stability, corrosion resistance and fabricability, several examples of application will be described. To approach the influence of fabrication on the material properties base materials studies are exemplarily complemented with results from welded and from cladded samples.

Subject
Sigma phase, Materials, Precipitation (solids), Sulfuric acid, Precipitates, Chromium, Mechanical properties, Corrosion losses, Sensitization, Phosphoric acid, Corrosion resistance, Annealing, Alloys
Keywords:
UNS N08034, 2.4692, UNS N08031, NiCrMoFe alloy, 6-Mo steel, mechanical properties, corrosion resistance, fabricability, sensitization, weldments
© 2019 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).
2019
Association for Materials Protection and Performance (AMPP)
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