High temperature alloys
Inconel 718

The chemical composition of Inconel 718: 

Alloy

%

NI

CR

FE

MO

NB

CO

C

MN

SI

S

CU

A1

TI

Inconel 718

The minimum

50

17

Margin

2.8

4.75

0.2

0.7

The maxmum

55

21

3.3

5.5

1

0.08

0.35

0.35

0.01

0.3

0.8

1.15

 

Physical properties of Inconel 718:

The density g/cm3

Melting point

Thermal conductivity
λ/(W/m•
)

Specific heat capacity 
J/kg•

Modulus of elasticity
GPa

Shear modulus
GPa

The resistivity
μΩ•m

Poisson's ratio

Linear expansion coefficient 
a/10-6-1

8.24

1260-1320

14.7(100)

435

199.9

77.2

0.3

11.8(20~100)

 

Inconel 718 mechanical properties at room temperature, the minimum value:

Alloy

Tensile strength
Rm N/mm2

The yield strength
RP0.2N/mm2

elongation
A5 %

Brinell hardness HB

Solution treatment

965

550

30

≤363

Aging treatment

1240

1040

12

≥363

 

Alloy Inconel 718 possesses the following features:
1.Easy workability.
2.High tensile strength, fatigue strength, creep strength and fracture strength At700.
3.Good comprehensive performance in 253 ~700, high oxidation capability at1000.
4.Stable chemical properties at low temperature.
5.Good welding performance.

Application fields for Inconel 718:
Can be widely applied in various occasion with high requirements because of its high temperature strength, excellent corrosion resistance ability and easy workability at700.
1.The steam turbine
2.The liquid fuel rocket
3.The cryogenic engineering
4.The acid environment
5.Nuclear engineering

 

The above data is for your reference, should you have any special requirements, please contact us!