N07718

   

Introduction 

Inconel 718 is a Nickel-Chromium alloy being precipitation hardenable and having high creep-rupture strength at high temperatures to about 700°C (1290°F). It has higher strength thanInconel X-750 and better mechanical properties at lower temperatures than Nimonic 90 andInconel X-750.

Chemical Composition of Inconel 718

The compositional range for Inconel 718 is provided in the table below.

Element

Content

Ni+Co

50 - 55 %

Cr

17 - 21 %

Fe

BAL

Nb+Ta

4.75 - 5.5 %

Mo

2.8 - 3.3 %

Ti

0.65 - 1.15 %

Al

0.2 - 0.8 %

Typical Properties of Inconel 718

Typical properties of Inconel 718 are covered in the following table.

Property

Metric

Imperial

Density

8.19 g/cm3

0.296 lb/in3

Melting point

1336 °C

2437 °F

Co-Efficient of Expansion

13.0 µm/m.°C
(20-100 °C)

7.2x10-6 in/in.°F
(70-212 °F)

Modulus of rigidity

77.2 kN/mm2

11197 ksi

Modulus of elasticity

204.9 kN/mm2

29719 ksi

Properties of Supplied Materials and Heat Treated Materials

Condition of Supply

Heat Treatment (After Forming)

No.1 Spring Temper/Spring Temper

1. Solution Anneal at 980°C (1800°F) for 1 hour and air cool and

2. Age harden at 720°C (1330°F) for 8 hours and furnace cool to 620°C (1150°F) and hold at 620°C (1150°F) for a total age hardening time of 18 hours and air cool.

No.1 Spring Temper/Spring Temper (NACE MRO175)

1. 1010°C (1870°F) 2 hours and air cool and

2. 790°C (1455°F) 6 hours and air cool.

Condition

Approx Tensile Strength

Approx Service Temp.

Annealed

800 - 1000 N/mm2

116 - 145 ksi

-

No.1 Spring Temper

1000 - 1200 N/mm2

145 - 175 ksi

-

No.1 Spring Temper + Annealed + Aged

1250 - 1450 N/mm2

181 - 210 ksi

-200 to +550°C

-330 to +1020°F

Spring Temper

1300 - 1500 N/mm2

189 - 218 ksi

-

Spring Temper + Annealed + Aged

1250 - 1450 N/mm2

181 - 210 ksi

-200 to +550°C

-330 to +1020°F

Relevant Standards

Inconel 718 is covered by the following standards:

         AMS 5663

         AMS 5832

         AMS 5962

         AMS 5662

         ASTM B637

Equivalent Materials

Inconel 718 is the tradename of Special Metals Group of Companies and equivalent to:

         W.NR 2.4668

         UNS N07718

         AWS 013

Applications of Inconel 718

Inconel 718 typically finds application in:

         Gas turbines

         Rocket motors

         Space craft

         Nuclear reactors and pumps.


Stock

Form

Specification

Supply Form

Others

Sheet

Thickness?0.40-4.75mm?General Width?1000?1219?1500mm

Whole Coil or piece of it

Cold Annealed?Surface 2B?2E

Plate

Thickness?4.76-60mm?Width?1500?2000?2500mm?Length?3000?6000?8000?8500mm?Under 10mm plate can be coiled?

Whole Coil or piece of it

Single hot rolling?Solid solution annealed state?Surface 1D

Belt

Thickness?0.10-3.0mm?Width?50-500mm

Whole Coil or Specified size

Cold Annealed?Surface 2B?2E

Bar & Rod

Rolled barΦ5-45mm?Length≤1500mm

Polished Bar?circle?Square?

Solution annealing,descaling

Forged barΦ26-245mm?Length≤4000mm

Weld tube

Outer diameterΦ4.76-135mm?Wall Thickness0.25-4.00mm?Length?≤35000 mm

Base on your requirement

Use for PHE

Seamless Tube

Outer diameterΦ3-114mm?Wall Thickness0.2-4.5mm

Base on your requirement

Use for PHE

Wire

Outer diameterΦ0.1-13mm

Base on your requirement

Ni & Ni alloy, Ti & Ti alloy

Forged piece

roundness and square alloy

Base on your requirement

Steel, Alloy

Flangs

All kinds of Flangs

Base on your requirement

Steel, Alloy

Welding Material

Coil wire Φ0.90mm/1.2mm/1.6mm

Base on your requirement

Certificate of Origin?America, Sweden, Britain, Germany, Austria, Italy, France.

Straight WireΦ1.2mm/1.6mm/2.4mm/3.2mm/4.0mm

Welding rodΦ2.4mm/3.2mm/4.0mm

Tube

Elbow, three links, four links, different diameter size

Base on your requirement

Ni & Ni alloy, Ti & Ti alloy

Explosive bonded laminate

Raw Sheet Thickness≥2mm

Base on your requirement

Ni & Ni alloy, Ti & Ti alloy

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