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Wednesday, March 25, 2009: 10:45 AM
C206 (Georgia World Congress Center)
ABSTRACT
INCOLOY™ alloy 865 is 50%Fe-24%Cr-21%Ni--2% Mo-1.2% Si-0.24% N alloy. It was originally designed for improved strength, ductility, and fatigue resistance for automotive flexible coupling applications. Preliminary testing showed its corrosion resistance is better than of 316L or 317L stainless steels. Its PREN number is 38 versus 25 for 316L. Alloy 865 offers improved resistance to localized corrosion and chloride stress corrosion cracking. A testing program was initiated to provide information on its corrosion resistance in several chemicals used in the CPI (Chemical Process Industry). The corrosives include sulfuric, hydrochloric, nitric, hydrofluoric, and phosphoric acids at various concentrations and temperatures. The alloy was also evaluated in various water environments contaminated with chlorides to determine its resistance to pitting, crevice corrosion, and stress corrosion cracking. All of the tests included type 316L stainless steel, 2205, 2507, 6 Mo alloy, and alloy 625 for comparative purposes. This paper presents the results of an extensive corrosion program to qualify alloy 865 for applications in the CPI and other related process industries.
INCOLOY™ alloy 865 is 50%Fe-24%Cr-21%Ni--2% Mo-1.2% Si-0.24% N alloy. It was originally designed for improved strength, ductility, and fatigue resistance for automotive flexible coupling applications. Preliminary testing showed its corrosion resistance is better than of 316L or 317L stainless steels. Its PREN number is 38 versus 25 for 316L. Alloy 865 offers improved resistance to localized corrosion and chloride stress corrosion cracking. A testing program was initiated to provide information on its corrosion resistance in several chemicals used in the CPI (Chemical Process Industry). The corrosives include sulfuric, hydrochloric, nitric, hydrofluoric, and phosphoric acids at various concentrations and temperatures. The alloy was also evaluated in various water environments contaminated with chlorides to determine its resistance to pitting, crevice corrosion, and stress corrosion cracking. All of the tests included type 316L stainless steel, 2205, 2507, 6 Mo alloy, and alloy 625 for comparative purposes. This paper presents the results of an extensive corrosion program to qualify alloy 865 for applications in the CPI and other related process industries.
See more of: Recent Experiences with Corrosion Resistant Materials - STG 39
See more of: Technical Symposium
See more of: Technical Symposium