Fabricators are becoming hesitant about using nickel containing welding wires for making submerged-arc welded (SAW) deposits that are used in H2S service. This is due to a 1% nickel restriction in NACE Standard MR-01-75(1). The nickel restriction appears to be based on work(2) done on a limited family of alloy steels, especially 4130 and 4340, where an indicated susceptibility to sulfide stress cracking (SSC) was associated with nickel content. This nickel relationship to SSC has been supported by other researchers(3) while still others(4-10) contend that microstructure, hardness, yield strength, and/or general composition are the contributing factors in SSC resistance and not nickel content per se.

Subject
Materials, Wiring, Stress, Sulfide stress, Mechanical failure, Steel, Deposit corrosion, Nickel, Sulfide stress cracking, Ferrite, Fracture, Hardness, Weld metal
© 1979 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).
1979
Association for Materials Protection and Performance (AMPP)
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