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02037 A NEW HIGH PERFORMANCE HIGHLY ALLOYED STAINLESS STEEL FOR SOUR SERVICE

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Product Number: 51300-02037-SG
ISBN: 02037 2002 CP
Author: U.H. Kivisakk C. Ulfvin and B Wald6n
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Alloy 36Mo is a new high strength super austenitic stainless steel for wirelines in sour service. Testing has shown tensiles around 300 ksi with good fatigue properties and excellent corrosion resistance. Fatigue testing, simulating a wheel used for winding a wireline up and down a well, and corrosion testing, including pitting corrosion testing and sour service cracking testing using SSRT in high concentrated chloride solutions containing 350 psi (0,98 MPa) H2S, have been performed. The metallurgy of Alloy 36Mo, 27Cr - 34Ni- 5.4Mo- 0.4N, gives an over all improvement of properties compared to the currently used materials UNS N08028 and UNS S08926. Alloy 36Mo shows a high PRE of 51 giving an improved pitting resistance and the high chromium and nickel contents increase the resistance to sour environment cracking. Keywords: wirelines, sour service, austenitic stainless steels, hydrogen sulfide, SSC, pitting, fatigue
Alloy 36Mo is a new high strength super austenitic stainless steel for wirelines in sour service. Testing has shown tensiles around 300 ksi with good fatigue properties and excellent corrosion resistance. Fatigue testing, simulating a wheel used for winding a wireline up and down a well, and corrosion testing, including pitting corrosion testing and sour service cracking testing using SSRT in high concentrated chloride solutions containing 350 psi (0,98 MPa) H2S, have been performed. The metallurgy of Alloy 36Mo, 27Cr - 34Ni- 5.4Mo- 0.4N, gives an over all improvement of properties compared to the currently used materials UNS N08028 and UNS S08926. Alloy 36Mo shows a high PRE of 51 giving an improved pitting resistance and the high chromium and nickel contents increase the resistance to sour environment cracking. Keywords: wirelines, sour service, austenitic stainless steels, hydrogen sulfide, SSC, pitting, fatigue
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Product Number: 51300-00139-SG
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02038 COMMON PITFALLS DURING SSC AND PITTING TESTING OF SUPERMARTENSITIC STAINLESS STEELS FOR USE IN PIPELINES

Product Number: 51300-02038-SG
ISBN: 02038 2002 CP
Author: Stein Olsen and Jakob Enerhaug
Publication Date: 2002
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The hardness values of weldments of supermartensitic stainless steels exceed limits for “sour service” and testing has to be done.  Most testing has been done by procedure defined in EFC Publication No 172. Some observations during testing have led to a discussion on the relevance of the test methods and procedures.
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