Inconel 617 (UNS N06617 / W.Nr. 2.4663a)

Inconel 617 (UNS N06617 / W.Nr. 2.4663a) is a nickel-chromium-cobalt-molybdenum alloy with an exceptional combination of high-temperature strength and oxidation resistance. The high nickel and chromium contents make the alloy 617 resistant to a variety of both reducing and oxidising environments, while the aluminium with the chromium provides oxidation resistance at high temperatures. Those elements with the molybdenum enable the alloy to withstand many wet corrosive environments.

Equivalent Grades

Inconel 617Inconel 617N06617NiCr23Co12Mo2.4663aNiCr23Co12MoNiCr23Co12Mo

Chemical Composition, %

Inconel 6170.05-0.15≤1.00≤1.00≤0.020≤0.01520.0-24.0≥45.08.0-10.00.8-1.5≤0.60≤0.50≤0.006≤3.0

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HRB

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM B166/ASME SB166(Rod, Bar, Wire), ASTM B564/ASME SB564(Forgings), DIN 17752(Bar)/17753(Wire)/17754(Forgings), ISO 9724(Wire)
Plate, Sheet and StripASTM B168/ASME SB168(Plate, Sheet, Strip), DIN 17750(Strip, Sheet), ISO 6208(Plate, Sheet, Strip)
Pipe and TubeASTM B564/ASME SB564(Forgings), DIN 17751(Tubing)
Welding ProductInconel Filler Metal 617-AWS A5.14/ERNiCrCoMo-1; Inconel Welding Eledtrode 117-AWS A5.11/ENiCrMoMo-1
OthersASTM B366/ASME SB366, DIN17742


With an exceptional combination of metallurgical stability, strength and oxidation resistance at high temperatures. Resistance to oxidation is enhanced by an aluminum addition. The alloy also resists a wide range of corrosive aqueous environments.


The combination of high strength and oxidation resistance at temperatures over 1800°F makes alloy 617 an attractive material for such components as ducting, combustion cans, and transition liner in both aircraft, and land based gas turbines. Because of its resistance to high-temperature corrosion, the alloy is used for catalyst-grid supports in the production of nitric acid, for heat-treating baskets, and for reduction boats in the refining of molybdenum. Alloy 617 also offers attractive properties for components of power-generating plants, both fossil-fueled and nuclear.