Inconel 718

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Inconel 718

Additional information

UNS Number

N07718

Werkstoff Number

2.4668

Description

Inconel 718 is a special type of high-strength superalloy with a nickel-chrome base that makes it resistant to corrosion, high pressure and extreme temperatures of up to 700°C.

Inconel 718 is a nickel-based super alloy that is well suited for applications requiring high strength in temperature ranges from cryogenic up to 1400°F. Inconel 718 also exhibits excellent tensile and impact strength.

Inconel 718 has been increasingly applied in commercial engines from the late 1960’s, specifically as the disc and rear frame material in gas turbines. Beyond these original and still major high temperature applications, it is also being used as a generic alloy in nuclear, oil and gas industries and cryogenic structures due to its excellent strength and aqueous corrosion resistance at ambient and low temperature.

Generally, Inconel 718 is the most widely used superalloy, accounting for about 35 % of all superalloy production, and over 50 % of the superalloy content in some engines.

Application

Inconel 718 can be used in a variety of applications including:

  • Gas turbine engine parts
  • Firearms production
  • Liquid fuel rocket motor components
  • Springs, fasteners
  • Cryogenic tanks

Chemical Component

Chemical Components Fe C Si Mn P S Cr Ni Cu Mo Ti Nb B Co Al  
Minimum Ba 17 50 2.8 0.65 0.5 0.2 Nb+Ta:

4.75~5.5

Maximum 0.08 0.35 0.35 0.015 0.015 21 55 0.3 3.3 1.15 2.5 0.006 1 0.8

 

Mechanical Properties

Tensile Strength
σb 
Mpa
Yield Point
σs 
Mpa
Elongation
δ 
%
Section Shrinkage

ψ

%

Hardness

HBW

≥1275 ≥1035 ≥12 ≥15 331~444

 

Product Form

Product Form Size Range From Size Range To
Sheet & Plate 0.30 mm 25 mm
Round Bar 4 mm 380 mm
Tube 6 mm 260 mm

 

 

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