Product Categories
Contact Us
Home > Exhibition > Content
Introduction of Nickel Alloy Inconel 718
Oct 20, 2017

718 Alloy is a nickel based heat resistant alloy. Its composition corresponds to UNS N07718, AMS 5662, AMS 5664, W.Nr 2.4668, DIN NiCr19Fe19NbMo3. This kind of precipitation-hardening nickel-chromium alloy is characterized by having good tensile, fatigue, creep and rupture strength at temperatures up to 700oC. Iconel 718 alloy also has outstanding corrosion resistance in various corrosive environments. This material is ideal for many high temperature applications such as gas turbine parts, instrumentation parts, power and process industry parts etc.


Applications

· Chemical processing

· Aerospace

· Liquid fuel rocket motor components

· Pollution-control equipment

· Nuclear reactors

· Cryogenic storage tanks

· Valves, fasteners, springs, mandrels, tubing hangers

· Well head completion equipment and blow out preventers (BOP’s)

· Gas turbine engine parts


Physical Data

Density (lb / cu. in.)

0.29

Specific Gravity

7.98

Specific Heat (Btu/lb/Deg F - [32-212 Deg F])

0.104

Electrical Resistivity (microhm-cm (at 68 Deg F))

753

Melting Point (Deg F)

2420

Poissons Ratio

0.284

Thermal Conductivity

77

Mean Coeff Thermal Expansion

7.3

Magnetic Permeability

1.001

Modulus of Elasticity Tension

29


Chemistry Data 

Elements

Al

B

C

Cr

Co

Cu

Fe

Mn

Mo

Ni

Comp. %

0.2-0.8

0.006 max

0.08 max

17-21

1 max

0.3 max.

Balance

0.35 max

2.8-3.3

50-55

Elements

Nb

P

Si

S

Ti





Comp. %

4.75-5.5

0.015 max

0.35 max

0.015 max

0.65-1.15






Specifications 

Pipe Smls

Tube Smls

Sheet/Plate

Bar

ASTM A 312ASTM-A-312ASTM-A-312

  AMS 5589, AMS 5590AMS 5589

  AMS 5590

   AMS 5589, AMS 5590AMS 5596

   AMS 5589, AMS 5590AMS 5597

ASTM B670AMS 5596

AMS 5662

AMS 5663

ASTM B637