Factors influencing the occurence of hydrogen induced cracking (HIC) and sulfide stress cracking (SSC) in steel plates for pipeline have been investigated. Tests have been performed according to NACE Standards TM02-84 and TM01-77.

Results show that in high thickness plates, low sulfur content and a correct Ca/S ratio are enough requirements to decrease the susceptibility to HIC. In low thickness plates, these conditions are not sufficient, solute segregation, through reduction of manganese content and heat treatments, must be decreased to improve the HIC resistance. The SSC resistance is also affected by the microstructure and the shape of non metallic inclusions.

Moreover test sample location is important : long or long transverse specimens do not differ very much but specimens located in the short transverse direction can be worse.

Subject
Sulfur, Hydrogen induced cracking, Microstructure, Stress cracking, Manganese, Heat, Steel, Carbon, Hydrophobic interaction chromatography, Sulfide stress cracking, Hydrogen, Inclusions, Hydrogen stress cracking
© 1986 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).
1986
Association for Materials Protection and Performance (AMPP)
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