Inconel® 718 – N07718 Nickel Chromium Superalloy Material Properties

The following data is provided for informational purposes only. It was provided with permission by Special Metals at www.specialmetals.com 

Inconel® 718, also known as UNS N07718, is used known for having high strength and resistance to most corrosive elements. Because of these characteristics, there is a always a need for parts forged in Inconel® 718 in many industrial sectors.

There are many characteristics of Inconel® 718 that make it appealing to many industries. This alloy has good mechanical properties, including tensile,  fatigue, and creep-rupture. It is also known for yielding high tensile strength, creep and rupture strength prosperities. Inconel® 718  is well known for its resistance to corrosive properties. This includes saltwater, chloride and chloride stress cracking, and sulfide stress cracking.

Chemical Compostion

(%max., unless shown as range or min.)

NI (+CO) CR MO FE NB + TA CO MG SI AL TI C P S B CU
Min./Max.
50.0-55.0
17.0-21.0
2.80-3.30
*Balance
4.75-5.50
1.0
0.35
0.35
0.20-0.80
0.65-1.15
0.08
0.015
0.015
0.006
0.30

*Reference to the ‘balance’ of a composition does not guarantee this is exclusively of the element mentioned but that it predominates and others are present only in minimal quantities.

Applicable Specifications

Product Specification
Forging Stock
ASTM B 637, ASME SB 637, SAE AMS 5662, SAE AMS 5663, SAE AMS 5664, SAE AMS 5832, SAE AMS 5914, SAE AMS 5962, ASME CODE CASE 1993, ASME CODE CASE 2206, ASME CODE CASE 2222, AECMA PREN 2404, AECMA PREN 2405, AECMA PREN 2952, AECMA PREN 2961, AECMA PREN 3219, AECMA PREN 3666, ISO 9723, ISO 9724, ISO 9725, DIN 17752-17754
Others
ASME CODE CASE N-62, ASME CODE CASE N-208, DIN 17744

Common Fabrication Processes

Inconel® 718 is a highly durable be forged into nearly any shape. This includes:

  • Aircraft blades and sheets
  • Pumps and Tubes and Shafts
  • Engine Systems – thrust reverser and jet exhausts
  • Valves
  • Hubs
  • Turbines – Shroud Rings
  • Rings and Discs
  • Fasteners
  • Tanks (gasoline and freshwater)

Industries that Commonly use Incoloy® 718 Forgings:

  • Aerospace and Aviation Engineering – Primary use of 718 forged parts
  • Power Generation
  • Nuclear
  • Home and Industrial Heating Equipment
  • Marine Engineering
  • Oil & Gasoline
  • Chemical and Industrial Processing
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