One of today's major materials challenges in oilfield equipment is to conciliate high mechanical characteristics with resistance to sulfide stress cracking (SSC). Two new steels are proposed to answer such a need. One is a 16 Cr - A Ni martensitic stainless steel (Virgo 38) ; it is intended for use in compressors and related equipments. Another is a low alloy 2.5 Cr - 0.8 Ni - 0.3 Mo martensitic steel (2.5 FDOV), for drilling equipment (e.g. tool joints). Results using current hydrogen embrittlement tests and SSC standards tests (NACE-TM-01-77) show a behavior that is better than that of currently proposed steels, such as 17.4 PH* or AISI 410. Observed trends according to chemical composition variations and heat treatments allow to expect even better future performances.

Subject
Materials, Secondary cracks, Tempering temperature, Molybdenum alloys, Vanadium, Stress cracking, Heat, Steel, Equipment, Carbon, Sulfide stress cracking, Alloys, Heat treatment
© 1981 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).
1981
Association for Materials Protection and Performance (AMPP)
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