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Alloy 718 Inconel Nickel Sheet, Coil, Round Bar & Plate - AMS 5596, 5662, UNS N07718


Inconel® 718 is a precipitation-hardening nickel-chromium alloy containing significant amounts of iron, columbium, and molybdenum, along with lesser amounts of aluminum and titanium. 718 maintains high strength and good ductility up to 1300°F (704°C). This alloy has relatively good weldability, formability, and excellent cryogenic properties compared to other precipitation hardening nickel alloys. The sluggish precipitation hardening response of this alloy allows it to be readily welded without hardening or cracking. 718 alloy is non-magnetic. It maintains good corrosion resistance and oxidation resistance and is used for parts requiring high resistance to creep and stress rupture up to 1300°F (704°C) and oxidation resistance up to 1800°F (982°C). 

Standard Inventory Specifications 

  • UNS N07718
  • AMS 5596
  • AMS 5662
  • ASTM B 670
  • ASTM B 637
  • ASME SB 670
  • EN 2.4668
  • EN 10204
  • B50TF14
  • B50TF15
  • PWA-LCS
  • GE-S400/1000
  • RR SABRe Edition 2
  • DFARS Compliant

Common Trade Names

  • Haynes 718 (® Haynes International)
  • ATI 718 (™ Allegheny Technologies)
  • Inconel Alloy 718 (® Special Metals)

Common Applications of Alloy 718 Nickel

  • Jet engine components
  • Gas turbine operations
  • Oil & gas

Inventory Size Range

  • Sheet : 0.016" - 0.165"
  • Bar : 0.250" - 10.000"
  • Plate : 0.1875" - 2.000"

Please contact us for more details.

The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.

Inconel 718 Sheet & Coil Chemical Properties

Nickel-Base Superalloy

Inconel 718 (UNS Designation N07718)

Chemical Composition
Element Percent by Weight
Carbon 0.08 maximum
Manganese 0.35 maximum
Phosphorus 0.015 maximum
Sulfur 0.015 maximum
Silicon 0.35 maximum
Chromium 17.00 - 21.00
Nickel 50.00 - 55.00
Molybdenum 2.80 - 3.30
Columbium 4.75 - 5.50
Titanium 0.65 - 1.15
Aluminum 0.20 - 0.80
Cobalt 1.00 maximum
Boron 0.006 maximum
Copper 0.30 maximum
Tantalum 0.05 maximum
Iron Balance

Resistance to Corrosion and Oxidation

Inconel 718 has good resistance to oxidation and corrosion at temperatures in the alloy’s useful strength range in atmospheres encountered in jet engines and gas turbine operations.

Nickel-Base Superalloy

Inconel 718 (UNS Designation N07718)

Physical Properties
  Annealed Condition Aged Condition
Density 0.296 lb./in3 (8.19 g/cm3) 0.297 lb./in3 (8.22 g/cm3)
Specific Gravity 8.19 8.22
Thermal Conductivity
Temperature Range Coefficients
°C °F W/m·K Btu/(hr/ft²/in/°F)
0-100 32-212 6.5 11.2

Electrical Resistivity at 68°F (20°C)

  • Annealed: 127 microhm-cm
  • Aged: 121 microhm-cm

Nickel-Base Superalloy

Inconel 718 (UNS Designation N07718)

Inconel 718 Mechanical Properties

Room Temperature Properties

The room temperature strength of the Inconel 718 is substantially increased by precipitation heat treatment as the following data indicate. These values are properties specified for sheet, strip and plate in AMS 5596 and AMS 5597.

  Yield Strength Max (0.2% Offset) Ultimate Tensile Strength Max Elongation (% in 2")
Sheet and Strip 80,000 psi (550 MPa) 14,000 (965 MPa) 30 (min)
Plate 105,000 psi (725 MPa) 150,000 (1,035 MPa) 30 (min)
Solution Treated plus Precipitation Heat Treatment
Yield Strength Min (0.2% Offset) Ultimate Tensile Strength Min Elongation (% in 2")
150,000 (1,035 MPa) 180,000 (1,240 MPa) 12 (min)

Typical Short Time Tensile Properties as a Function of Temperature

Typical short time tensile properties as a function of temperature are shown here for material solution treated and aged as follows:

  • Solution Treatment: 1800°F (982°C) 1 hour
  • Precipitation Treatment: 1325°F (718°C) 8 hours, Furnace Cool at 100°F (55°C) per hour to 1150°F (621°C) 8 hours

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