Inconel Series

Inconel 718

    Grade: ALLOY 718, UNS N07718, DIN W. NR. 2.4668

     

    Surface: According to your request

Product Detail
Specification:
Inconel 718 alloy is a body-centered tetragonal γ "and a face-centered cubic γ 'phase precipitation strengthened nickel-based superalloy, has a good overall performance in the temperature range of -253 ~ 700 ℃, 650 ℃ below the yield strength of the Habitat modification the first high-temperature alloys, and has a good anti-fatigue, anti-radiation, anti-oxidation, corrosion resistance, and good processing properties, welding performance and long-term organizational stability, capable of producing complex parts of various shapes in space, nuclear energy , the oil industry, obtained in the above temperature range a very wide range of applications.
Another characteristic of this alloy is Alloy particularly sensitive to thermal processing, master alloy phase precipitation and dissolution of the relationship between law and technology organization, performance, and between, you can make reasonable and feasible technical rules for different requirements, it is can be obtained to meet the different intensity levels and use requirements of the various parts. There are varieties of supply forgings, forged bars, roll bars, cold-rolled bars, round cake, rings, plates, strips, wire, tube and so on. It can be made into plates, rings, blades, shafts, fasteners and elastic components, sheet metal structural parts, casing and other components of long-term use in aviation.
Brand Name: SMC
Grade: ALLOY 718, UNS N07718, DIN W. NR. 2.4668
Surface: According to your request
Guarantee: We bear all the problems of product quality
Shape: Round
Standard: ASTM ASME
Certification: ISO 9001:2008
Color: Nickel Nature
Packing: Common sea freight wooden case package/ Also can be customized
Payment: L/C,T/T

Delivery: Usually sample lead time is 7 days after payment has been confirmed.


Chemical Composition

CONTINUED 1-1%

Physical properties

1. Character

Alloy 718 is an age-hardenable Alloy-chromium alloy that combines corrosion resistance with high strength and good fabricability. It has high creep-rupture strength at temperatures up to 700 OC. Its excellent relaxation resistance contributes to its application in springs.

2. Application 

Gas turbine engines

Rocket motors

Nuclear reactors

Spacecraft

3. Hot Forming

Because of its strength, INCONEL alloy 718 is more resistant than most materials to deformation during hot forming. It is readily hot-worked if sufficiently powerful equipment is used. Hot forming is performed in the 1650°-2050°F temperature range. In the last operation, the metal should be worked uniformly with a gradually decreasing temperature, finishing with some light reduction in the 1650°-1750°F range. This procedure is necessary to ensure notch ductility in stress-rupture applications when material has been annealed and aged. In heating for hot working, the material should be brought up to temperature, allowed to soak a short time to ensure uniformity, and withdrawn. To avoid duplex grain structure INCONEL alloy 718 should be given uniform reductions. Final reductions of 20% minimum should be used for open-die work and 10% minimum for closed-die work. Parts should generally be aircooled from the hot-working temperature rather than waterquenched. Care should be taken to avoid overheating the metal by heat buildup due to working. Also, the piece should be reheated when any portion has cooled below 1650°F. Preheating tools and dies to 500°F is recommended. Any ruptures appearing on the surface of the workpiece must be removed at once. Following annealing and aging, specimens were rupturetested at 1200°F and 100 ksi. Success in achieving notchrupture ductility with forgings of alloy 718 through this type of procedure has also been reported by others.

4. Cold Forming 

INCONEL alloy 718 can be cold-formed by standard procedures used for steel and stainless steel. 

5. Machining

INCONEL alloy 718 can be readily machined, but its high strength and work-hardening characteristics must be considered in the selection and use of proper tool materials and design, operating speeds, and coolants. When machined in the age-hardened condition the alloy will have a slightly better finish; chip action on chipbreaker tools will be better. The use of annealed material, however, provides easier machining and longer tool life.

6. Super-Plastic Forming

This alloy, designated INCONEL alloy 718SPF, is available as annealed sheet in thicknesses from 0.02 to 0.08 inches (0.5 to 2.0 mm) in widths up to 36 inches (914 mm). The specification SAE AMS 5950 was developed to define the requirements for the alloy.

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