Oil and Gas Metallics

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The Oil and Gas Materials Selection & Metallurgy Technical Community of Interest is a group of people (both AMPP members and nonmembers) who have come together for the purpose of furthering a common cause by sharing wisdom, knowledge, information, and/or data  for evaluation and methods of selection of types of metals for all types of equipment used for oil and gas production.

 Primary and Secondary Cracking Mechanism for Martensitic Stainless steels

Kapil Rokade's profile image
Kapil Rokade posted 09-24-2025 03:49 AM

Hello everyone,

I'm a new member of this community and currently working as a Materials Engineer at Schlumberger. Over the past few years, I've been actively involved in NACE-related projects and corrosion testing within the oil and gas industry. It's great to see such vibrant discussions here, and I'm looking forward to learning and contributing.

While reviewing ISO 15156-3:2020/Cir.2:2022(E) for corrosion test parameters related to Martensitic stainless steels, I noticed a potential inconsistency:

  • In Table B.1, the primary cracking mechanisms listed are SSC (Sulphide Stress Cracking) and GHSC (Galvanic Hydrogen Stress Cracking).

  • However, in Table B.5, SCC (Stress Corrosion Cracking) is listed as the primary mechanism, while SSC and GHSC are shown as secondary mechanisms.

This appears contradictory, and it seems the designation of primary and secondary mechanisms may have been swapped. Not aware about whether I can post snapshots of specifications here so didn't share it as attachments.

Could someone help verify if this is indeed an error? And if so, what is the correct channel to report it for review or correction?

Thanks in advance for your insights!