Inconel 718 Tech Data, Inconel 718, Nickel 718 Sheet 718 Plate 718 Pipe 718 Tube 718 Tubing 718 Rod 718 Bar AMS 5596 B5T0TF14 UNS N07718 AMS 5589 AMS 5590 ASTM-A-312 AMS 5662 AMS 5663 AMS 5664

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* Inconel/Incoloy and Monel are Registered Trademarks of Special Metals Corporation and its subsidiaries.


Inconel 718 Technical Data

Description: Inconel 718 is a precipitation hardenable nickel-based alloy designed to display exceptionally high yield, tensile and creep-rupture properties at temperatures up to 1300 Degrees F. The sluggish age-hardening response of Inconel 718 permits annealing and welding without spontaneous hardening during heating and cooling. Inconel 718 has excellent weldability when compared to the nickel-base superalloys hardened by aluminum and titanium.

Application: Inconel 718 has been used for jet engine and high-speed airframe parts such as wheels, buckets, spacers, and high temperature bolts and fasteners.

Specifications: UNS N07718. Werkstoff Nr 2.4668, AMS 5596  Sheet, Strip and Plate, AMS 5597  Sheet, Strip and Plate, AMS 5589  Seamless Tube, AMS 5590  Seamless Tube, AMS 5662  Bars, Forgings and Rings, AMS 5663  Bars, Forgings and Rings, AMS 5664  Bars, Forgings and Rings, AMS 5832  Welding Wire, ASTM B637  Forgings, ASTM B670  Plate, Sheet and Strip, AFNOR NC 19 Fe Nb , MSRR 7115 and MSRR 7116




Typical Mechanical Properties:

Alloy 718 - AMS 5662 (properties after heat treatment to AMS 5663)

Specimen Orientation

Tensile Strength Ksi Yield Strength  (0.2% Offset) Ksi Elongation in 4D (%)

Reduction of Area %

Longitudinal 185 150 12 15
Long-Transverse (forgings) 180 150 10 12
Transverse (Bars) 180 150 6 8


Heat Treatment:
The following heat treatment should be used to obtain the best combination of tensile properties and stress rupture properties:
1 hr 1750 Degrees F to 1800 Degrees F (954 to 982 Degrees C) air cool + 8hr 1325 Degrees F (718 Degrees C) cool 100 Degrees F /hr to 1150 Degrees F (56  Degrees C/hr to 621 Degrees C), hold 8 hrs and air cool. To obtain the best room temperature and cryogenic tensile properties, the following heat treatment should be used: 1 to 2 hr 1950 Degrees F (1066 Degrees C), air cool + 8 hr 1325 Degrees F (718 Degrees C) cool 100 Degrees F/hr to 1150 Degrees F (56 Degrees C/hr to 621 Degrees C), hold 8 hr and air cool.


Hot Working
Hot-working is carried out using a 2050 Degrees F (1121 Degrees C) maximum furnace temperature. Hot-cold working in the range 1700/1850 Degrees F (927/1010 Degrees C) will improve the strength of the forging if the service temperature is below about 1100 Degrees F (593 Degrees C). Prolonged soaking at the forging temperature is not desirable. The material should be given uniform reductions to avoid the formation of duplex grain structures.

Alloy 718 can be readily machined in either the annealed or the age-hardened condition. The age-hardened condition gives better chip action on chip breaker tools and produces a better finish. The annealed condition will give a slightly longer tool life.

Alloy 718 can be welded in either the annealed or the age condition. Welding in the aged condition will cause the formation of a softened heat-affected zone.


Price List for Inconel 718 Sheet Cut to Size


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