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10319 A New High-Strength, Corrosion-Resistant Alloy for Oil and Gas Applications

Picture for 10319 A New High-Strength, Corrosion-Resistant Alloy for Oil and Gas Applications
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Product Number: 51300-10319-SG
ISBN: 10319 2010 CP
Author: Lee M. Pike, Paul E. Manning and Edward L. Hibner
Publication Date: 2010
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A new alloy was introduced recently for applications requiring both corrosion resistance and high strength. Being a C-type alloy (Ni-Cr-Mo), the new material has excellent resistance to uniform and localized corrosion in both reducing and oxidizing acids. However, the new alloy is capable of being age-hardened to effectively double the yield strength over other C-type alloys. More recently, the new alloy has generated interest in the oil & gas industry due to its resistance to sour gas environments. A considerable amount of testing has been performed to support the new alloy in this application. In this paper, the properties of the new alloy relevant to the oil and gas industry will be presented. These include the NACE standard room temperature tensile test for sulfide stress cracking and slow strain rate tensile testing at elevated temperatures (Level VII) both with and without the presence of elemental sulfur. The alloy has shown excellent resistance in all test conditions. Finally, efforts to develop alternate processing routes for very high strength applications will be detailed.

Key words: sour gas testing, high-strength, Ni-Cr-Mo, cold work, cold work and aged, C-22HS
A new alloy was introduced recently for applications requiring both corrosion resistance and high strength. Being a C-type alloy (Ni-Cr-Mo), the new material has excellent resistance to uniform and localized corrosion in both reducing and oxidizing acids. However, the new alloy is capable of being age-hardened to effectively double the yield strength over other C-type alloys. More recently, the new alloy has generated interest in the oil & gas industry due to its resistance to sour gas environments. A considerable amount of testing has been performed to support the new alloy in this application. In this paper, the properties of the new alloy relevant to the oil and gas industry will be presented. These include the NACE standard room temperature tensile test for sulfide stress cracking and slow strain rate tensile testing at elevated temperatures (Level VII) both with and without the presence of elemental sulfur. The alloy has shown excellent resistance in all test conditions. Finally, efforts to develop alternate processing routes for very high strength applications will be detailed.

Key words: sour gas testing, high-strength, Ni-Cr-Mo, cold work, cold work and aged, C-22HS
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