I was invited by Prof. Roy Johnsen and the Norsk Forening for Vedlikehold committee to give a presentation at the 2015 Robust materialvalg i oljeindustrien conference, which was held in Stavanger on October 27-28.
The title of the lecture was “High strength low alloy steels and hydrogen: microstructure, strength, and hardness limits”. In this presentation, we discussed the origins of the famous 22 HRC hardness limit in NACE MR0175, posteriorly adopted by the current ISO 15156-2 standard. We also talked about the environmental boundaries of corrosion resistant alloys as presented in ISO 15156-3 and the limitations of the approach. Finally, we discussed the future of materials for subsea oil and gas production, and the need for a common industry approach for qualification testing of low alloy steels with strength and hardness outside ISO 15156-2 option 1 limits.
The presentation is embedded below.
- ISO 15156-2:2015 “Petroleum and natural gas industries -- Materials for use in H2S-containing environments in oil and gas production -- Part 2: Cracking-resistant carbon and low-alloy steels, and the use of cast irons”, (International Organization for Standardization, Geneva, Switzerland, 2015).
- ISO 15156-3:2015 “Petroleum and natural gas industries -- Materials for use in H2S-containing environments in oil and gas production -- Part 3: Cracking-resistant CRAs (corrosion-resistant alloys) and other alloys”, (International Organization for Standardization, Geneva Switzerland, 2015).