A precipitation hardened cupronickel has been developed to provide 750 N/mm2 typical proof stress, high resistance to marine environments and complete freedom from hydrogen embrittlement. The designing and development of the alloy are described and laboratory and field testing and results discussed. Service experience with the very high strength cupronickel is reviewed and assessment of components which have seen long term service is described. It is concluded that the developed alloy, applied correctly, offers the opportunity to utilize the benefits of a copper alloy for highly loaded critical components such as bolting on Naval vessels and offshore structures.

Subject
Hydrogen embrittlement, Materials, Corrosion resistant alloys, Cathodic protection, Nickel based alloys, Seawater, Copper alloys, Stress, Copper nickel alloys, Corrosion resistance, Copper, Aluminum alloys, Hydrogen
Keywords:
Copper-nickel, nickel-copper, seawater corrosion, marine corrosion, hydrogen embrittlement, high strength, galvanic corrosion, cathodic protection, bolting, amines
© 1995 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).
1995
Association for Materials Protection and Performance (AMPP)
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