The development of a new family of TMA heat resistant alloys is summarized. Creep-rupture, relaxation, high temperature tensile, aged ductility, oxidation and carburization data are presented. These data are used to compare reformer furnace tube a Toys TMA 4700 and TMA 6300 with HK-40, HP-45 and HP-45 + Nb. Pyrolysis furnace tube alloys TMA 4750 and TMA 6350 are compared with high silicon HK-40 and HP-45 alloys. Computer analysis of reformer furnace tube life for TMA 4700 and HK-40 alloys suggests the existence of an optimum wall thickness for maximum tube life. The optimized life of a TMA 4700 reformer tube is compared to that of an HK-40 tube.

Subject
Test methods, Carburization, Materials, Carbides, Nickel based alloys, Tubes, Atmosphere, Stress, Heat, Wall thickness, Titanium alloys, Alloys, Ductility
© 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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