Super Martensitic Stainless Steel UNS S41426 Bar Manufactured to Optimize Sour Service Performance

Key words: super martensitic stainless steel, bar stock, SSC, SCC, application window, mild sour service, qualification INTRODUCTION ISO(2) 13680 / API(3) 5CRA Group 1 - Category 13-5-2 Super Martensitic Stainless Steel (SMSS) is widely used for downhole production tubing and liners in the Oil &...

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Bibliographic Details
Published inNACE International Corrosion Conference Proceedings pp. 1 - 11
Main Authors Smith, Lee, Morana, Roberto, Intiso, Luciana, Scoppio, Lucrezia, Amaya, Hisashi, Nice, Perry, Mortali, Giuseppe, Matsuo, Daisuke, Nakahata, Takuji
Format Conference Proceeding
LanguageEnglish
Published Houston NACE International 01.01.2018
Subjects
Gas industry
Hardness
Impact strength
Linings
Manufacturers
Manufacturing
Martensitic stainless steels
Materials selection
Mechanical properties
Optimization
Proof stress
Quality management
Stainless steel
Stress corrosion cracking
Stress cracking
Ultimate tensile strength
Yield stress
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Summary:Key words: super martensitic stainless steel, bar stock, SSC, SCC, application window, mild sour service, qualification INTRODUCTION ISO(2) 13680 / API(3) 5CRA Group 1 - Category 13-5-2 Super Martensitic Stainless Steel (SMSS) is widely used for downhole production tubing and liners in the Oil & Gas industry at strength levels of 95ksi and 110ksi specified minimum yield strength (SMYS). Optimization of the tubular material chemistry, cleanliness and manufacturing route has delivered useful sour service (sulfide stress cracking [SSC] and stress corrosion cracking [SCC]) performance, including for the 110ksi grade1'2'3'4. Confidence has been reenforced by thousands of successful NACE TM0177 production SSC tests, performed in full conformance with the requirements of ISO 15156-3 / NACE MR0175 Part 3 Annex B. Application limits are influenced by many factors, so care should be taken in application of generic materials selection aids that focus only on produced fluids or only on isolated parameters. Actual values were 116 ksi, 119 ksi and 121 ksi for heats A, B and C, respectively. * Maximum 893 MPa (130ksi) ultimate tensile strength in accordance with ASTM A370 (longitudinal, mid-radius) * Minimum 68J (50 ft-lbs) average and 45J (33 ft-lbs) single specimen mid-radius, transverse Charpy energy at -10°C (14°F) in accordance with ASTM E23 * Maximum hardness of 29HRC near surface in accordance with ASTM E18 For the purposes of this investigation greater focus was placed on hardness and 0.2% proof stress.