Incoloy 27-7Mo alloy is an advanced 7% molybdenum superalloy with superior corrosion resistance to 6% molybdenum superalloys in most environments. In many applications, the corrosion resistance of Incoloy 27-7Mo approaches that of higher-alloyed materials such as INCONEL 625,22, and C-276.
The Incoloy 27-7Mo alloy typically contains 27% nickel, 22% chromium, 7.2% molybdenum, and 0.34% nitrogen. The nickel and nitrogen content in the alloy form a stable austenitic structure. Thanks to the molybdenum, chromium, and nitrogen composition, the Incoloy 27-7Mo alloy exhibits excellent resistance to pitting and crevice corrosion. Nickel, nitrogen, and molybdenum provide resistance to reducing media, while the high chromium content offers protection against oxidizing media. The alloy performs well in mixed acid environments, particularly those containing both oxidizing and reducing acids. Its nickel and nitrogen content also enable it to resist stress corrosion cracking and alkaline medium erosion. The Incoloy 27-7Mo alloy demonstrates superior corrosion resistance in seawater and brine environments. It maintains stress corrosion crack resistance across all sodium chloride concentrations up to boiling point saturation. Furthermore, it can withstand corrosive media encountered in air pollution control systems, such as flue gas desulfurization equipment in high-sulfur coal-fired power plants.
The Incoloy 27-7Mo alloy is widely used in pollution control, power generation, marine engineering, chemical processing, pulp and paper manufacturing, as well as the oil and gas industry. This alloy delivers a unique combination of corrosion resistance, high strength, and cost-effective manufacturability. Standard product forms include plates, sheets, bars, rods, wire rods, tubes, pipes, and forged blanks.
The density of the alloy is ρ=8.02g/cm³.
