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List of Alloys & profiles

List of Alloys & profiles

Alloy Wire International

Datasheet: Inconel® 718

Inconel® 718

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 than Inconel® X-750 and better mechanical properties at lower temperatures than Nimonic 90 and Inconel® X-750. Inconel® 718 has exceptional weldability compared to the Nickel-base super alloys hardened by Aluminium and Titanium.

Available in all profile options

Inconel® 718 - Alloy Wire International 1

Key Features

Inconel® 718 offers the following key features:

Good creep rupture strength at high temperatures
Higher strength than Inconel X-750
Better mechanical properties at lower temperatures than Nimonic 90 & Inconel X-750
Age hardenable
High temperature dynamic applications^^

Typical Applications

Inconel® 718 is known to be suitable for the following applications:

Gas Turbines
Rocket Motors
Space Craft
Nuclear Reactors
Pumps
Oil & Gas Equipment


Designations

W.NR 2.4668
UNS N07718
AWS 013

Specifications

AMS 5662
AMS 5663
AMS 5832
AMS 5962
ASTM B637
GE B5OTF14/15
GE B14H89
ISO 15156-3
(NACE MR 0175)
API 6A718

Chemical Composition

The chemical composition of Inconel® 718 is indicated in the table below:

ElementMin %Max %
C0.08
Mn0.35
Si0.35
P0.015
S0.015
Cr17.0021.00
Ni50.0055.00
Mo2.803.30
Nb/Cb4.755.50
Ti0.651.15
Al0.200.80
Co1.00
Ta0.05
B0.006
Cu0.30
Pb0.0005
Bi0.00003
Se0.0003
Febal 

Alloy Details

Inconel® 718 density, melting point, coefficient of expansion, modulus of rigidity, and elasticity is indicated in the table below:

DensityMelting PointCoefficient of ExpansionModulus of RigidityModulus of Elasticity
8.19g/cm³133 6 °C13.0 μm/m °C (20 – 100 °C)77.2 kN/mm²204.9 kN/mm²
0.296 lb/in³2437 °F7.2 x 10-6 in/in °F (70 – 212 °F)11197 ksi29719 ksi

Heat treatment of finished parts

The typical heat treatment of Inconel® 718:

Condition as supplied by AWITypeTemperatureTimeCooling
No. 1 or Spring TemperAnneal
Age Harden
Total Age
980 °C (1800 °F)
720 °C (1330 °F)
620 °C (1150 °F)
1hr
8hr
18hr
Air
Furnace
Air
No. 1 or Spring Temper
(for ISO 15156-3 / NACE MR 0175)
Anneal
Age Harden
1010 °C (1850 °F)
790 °C (1455 °F)
2hr
6hr
Air
Air
No. 1 Temper or Spring TemperAge Harden
Total Age
720 °C (1330 °F)
620 °C (1150 °F)
8hr
18hr
Furnace
Air

Properties

The typical mechanical properties of Inconel® 718:

Annealed
Approx. tensile strength<1000 N/mm²<145 ksi
No. 1 Temper
Approx. tensile strength1000 – 1200 N/mm²145 – 175 ksi
Spring Temper
Approx. tensile strength1250 – 1550 N/mm²180 – 225 ksi
No. 1 Temper + Annealed + Aged
Approx. tensile strength1250 – 1450 N/mm²181 – 210 ksi
Approx. operating temperature depending on load^^ and environment-200 to +550 °C-330 to +1020 °F
No. 1 Temper + Aged
Approx. tensile strength1520 – 1720 N/mm²220 – 250 ksi
Approx. operating temperature depending on load^^ and environmentContact Alloy Wire Technical Dept
Spring Temper + Annealed + Aged
Approx. tensile strength1250 – 1450 N/mm²181 – 210 ksi
Approx. operating temperature depending on load^^ and environment-200 to +550 °C-330 to +1020 °F
Spring Temper + Aged
Approx. tensile strength1700 – 1950 N/mm²247 – 283 ksi
Approx. operating temperature depending on load^^ and environmentContact Alloy Wire Technical Dept

The above tensile strength ranges are typical. If you require different please ask.

^^ Dynamic applications = active / lively / changing