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51315-5758-Super Martensitic Stainless Steel and Sour Service—Testing and Evaluations

Picture for Super Martensitic Stainless Steel and Sour Service—Testing and Evaluations
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Product Number: 51315-5758-SG
ISBN: 5758 2015 CP
Author: Jan Skar
Publication Date: 2015
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The use weldable Super Martensitic Stainless Steel (SMSS S13Cr) started at the end of 1990’s. The material is attractive for corrosive hydrocarbon service due to the resistance to CO2 corrosion and low cost compared to duplex stainless steel. SMSS is sensitive to Sulphide Stress Cracking (SSC) and Stress Corrosion Cracking (SCC) and must be tested for both mechanisms. Due to the lack of commonly accepted limits in international standard (NACE MR0175 / ISO 15156-3) internal qualification testing has been performed. During the qualification there has been many lessons learnt and the test procedure has developed over the time as new knowledge has been realized. An important effect is the materials response to pipeline laying procedure and how this has to be accounted for during testing and interpretation of the test results. Other types of corrosion forms such as Inter Granular Stress Corrosion Cracking (IG SCC) and Hydrogen Induced Stress Cracking (HISC) has occurred and countermeasures implemented. The paper gives a historical overview of the challenges that have been encountered and how these challenges have been solved. Keywords: Super Martensitic Stainless Steel; Testing Development Corrosion Failures; Sour Service.
The use weldable Super Martensitic Stainless Steel (SMSS S13Cr) started at the end of 1990’s. The material is attractive for corrosive hydrocarbon service due to the resistance to CO2 corrosion and low cost compared to duplex stainless steel. SMSS is sensitive to Sulphide Stress Cracking (SSC) and Stress Corrosion Cracking (SCC) and must be tested for both mechanisms. Due to the lack of commonly accepted limits in international standard (NACE MR0175 / ISO 15156-3) internal qualification testing has been performed. During the qualification there has been many lessons learnt and the test procedure has developed over the time as new knowledge has been realized. An important effect is the materials response to pipeline laying procedure and how this has to be accounted for during testing and interpretation of the test results. Other types of corrosion forms such as Inter Granular Stress Corrosion Cracking (IG SCC) and Hydrogen Induced Stress Cracking (HISC) has occurred and countermeasures implemented. The paper gives a historical overview of the challenges that have been encountered and how these challenges have been solved. Keywords: Super Martensitic Stainless Steel; Testing Development Corrosion Failures; Sour Service.
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51317--9645-Sulfide Stress Cracking (SSC) Resistance of AISI 420 Modified (13Cr) Martensitic Stainless Steel Bar

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10345 Critical Pitting Temperature of Martensitic and Super-Martensitic Stainless Steels in Simulated Sour Environments

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