Inconel 617 Tech Data, Inconel 617, Nickel 617 Sheet 617 Plate 617 Pipe 617 Tube 617 Tubing 617 Rod 617 Bar 617 AMS 5889 ASTM-B-168 UNS N06617 Nickel Sheet Alloys 200, 400, 600, 601, 617, 625, 718, 750, 800, 825, C276

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Inconel 617 Technical Data

Description: Inconel 617 is a solid-solution, nickel-chromium-cobalt-molydenum alloy with an exceptional combination of high-temperature strength and oxidation resistance. The alloy also has excellent resistance to a wide range of corrosive environment, and it is readily formed and welded by conventional techniques. The high nickel and chromium contents make the alloy resistant to a variety of both reducing and oxidizing media. The aluminum, in conjunction with the chromium, provides oxidation resistance at high temperatures. Solid-solution strengthening is imparted by the cobalt and molydenum.

Applications: The combination of high strength and oxidation resistance at temperatures over 1800 Degrees F makes Inconel 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. Inconel 617 also offers attractive properties for components of power-generating plants, both fossil-fueled and nuclear.

Specification: Inconel 617 is available in Round Bar, Forging Stock, Extruded Section, Pipe, Tube, Plate, Sheet, Strip and Wire.

Similar specifications are: UNS N06617, ASTM B 166, ASME SB-166, Boiler Code Sections I, VIII, SAE AMS 5887, SAE AMS 5888 and SAE AMS 5889




Typical Mechanical Properties:





Inconel 617 Rupture Strength (1000 h)




650 Degrees C / 1200 Degrees F  47,000 320
760 Degrees C / 1400 Degrees F 22,000 150
870 Degrees C / 1600 Degrees F 8,400 58
980 Degrees C / 1800 Degrees F 3,600 25
1095 Degrees C / 2000 Degrees F 1,500 10

Corrosion Resistance:
The composition of Inconel 617 includes substantial amounts of nickel, chromium, and aluminum for a high degree of resistance to oxidation and carburization at high temperatures. Those elements, along with the molybdenum content, also enable the alloy to withstand many wet corrosive environments.

Oxidation and Carburization
The excellent resistance of Inconel 617 to oxidation results from the alloy's chromium and aluminum contents. At elevated temperatures, those elements cause the formation of a thin, subsurface zone of oxide particles. The zone forms rapidly upon exposure to high temperatures until it reaches a thickness of 0.001 to 0.002 in. The oxide zone provides the proper diffusion conditions for the formation of a protective chromium oxide layer on the surface of the metal. It also helps to prevent spalling of the protective layer. Alloy 617 has excellent resistance to carburization.

Corrosion by Acids
Inconel 617 has good resistance to a variety of both reducing and oxidizing acids. The chromium in the alloy confers resistance to oxidizing solutions while the nickel and molybdenum provide resistance to reducing conditions. The molybdenum also contributes resistance to crevice corrosion and pitting. In boiling nitric acid, at concentrations under 20%, corrosion rates are less than 1mpy (0.025mm/yr). At 70% concentration, the rate is a relatively low 20mpy (0.5 mm/yr). The rates were determined from tests of 72 hrs duration. In sulfuric acid, alloy 617 has shown useful resistance to concentrations of up to about 30% at a temperature of 175 Degrees F and about 10% at boiling temperature. The table below gives the results of laboratory tests in sulfuric acid. Test duration was 72 hrs except for tests in boilng 30% and 40% solutions, which were of 48 hrs duration. The alloy has shown moderate to poor resistance to hydrochloric acid. Laboratory tests at 175 Degrees F have produced corrosion rates of 150 mpy (3.8 mm/yr) at 10% concentration, 95 mpy (2.4 mm/yr) at 20% concentration, and 50 mpy (1.3 mm/yr) at 30% concentration. Inconel 617 has excellent resistance to phosphoric acid.

Inconel 617 has good fabricability. Forming, machining, and welding are carried out by standard procedures for nickel alloys. Techniques and equipment for some operations may be influenced by the alloy's strength and work-hardening rate.

Hot and Cold Forming
Inconel 617 has good hot formability, but it requires relatively high forces because of its inherent strength at elevated temperatures. In general, the hot-forming characteristics of alloy 617 are similar to those of Inconel alloy 625. The temperature range for heavy forming or forging is 1850 to 2200 Degrees F . Light working can be done at temperatures down to 1700 Degrees F. Inconel 617 is readily cold formed by conventional procedures although its work-hardening rate is high. For best results , the alloy should be cold formed in the fine-grain condition, and frequent intermediate anneals should be used. Annealing for cold forming should be done at 1900 Degrees F.

Heat Treatment
Inconel 617 is normally used in the solution-annealed condition. That condition provides a coarse grain structure for the best creep-rupture strength. It also provides the best bend ductility at room temperature. Solution annealing is performed at a temperature of 2150 Degrees F for a time commensurate with section size. Cooling should be by water quenching or rapid air cooling.

Inconel 617 has excellent weldability. Inconel Filler Metal 617 is used for gas-tungsten-arc and gas-metal-arc welding. The composition of the filler metal matches that of the base metal, and deposited weld metal is comparable to the wrought alloy in strength and corrosion resistance.


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