Alloy 945 and its Derivatives - Higher Strength Products for Oil and Gas

Alloy 945 and its Derivatives – Higher Strength Products for Oil and Gas Sarwan Mannan Special Metals Corporation, Huntington, WV 25705-1771 A new Ni-base alloy with nominal composition of Fe-47Ni-20.5Cr-3Mo-2Cu-3Nb-1.5Ti is developed to provide 125 ksi minimum yield strength and an excellent combination of ductility and impact strength. Testing in various NACE environments has shown that the alloy has excellent stress corrosion and sulfide stress corrosion resistance. The alloy is NACE approved to MR0175 / ISO-15156-3 level VI. In the recent corrosion testing, the alloy passed NACE level VII and NACE level VI at 450F. A number of mill heats are melted and processed to establish commercial availability. In addition to general alloy characteristics, the paper will present development of a 140 ksi min yield strength derivative of alloy 945. Capability of the alloy to produce pump shaft products for 125 ksi min, 165 ksi min, and 210 ksi min yield strength will be also be presented.