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Inconel® 718
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Inconel® 718

Available in any of the 'profile options'

A Nickel-Chromium alloy being precipitation hardenable and having high creep-rupture strength at high temperatures to about 700oC (1290oF). It has higher strength than Inconel X-750 and better mechanical properties at lower temperatures than Nimonic 90 and Inconel X-750.

Chemical Composition Specifications Designations Key Features Typical Applications
Element Min % Max %
C 0.08
Mn 0.35
Si 0.35
P 0.015
S 0.015
Cr 17.00 21.00
Ni 50.00 55.00
Mo 2.80 3.30
Nb/Cb 4.75 5.50
Ti 0.65 1.15
Al 0.20 0.80
Co 1.00
Ta 0.05
B 0.006
Cu 0.30
Pb 0.0005
Bi 0.00003
Se 0.0003
Fe bal
AMS 5662
AMS 5663
AMS 5832
AMS 5962
ASTM B637
GE B5OTF14/15
GE B14H89
ISO 15156-3
(NACE MR 0175)
W.NR 2.4668
UNS N07718
AWS 013
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
Gas Turbines
Rocket Motors
Space Craft
Nuclear Reactors
Pumps
Density 8.19g/cm³ 0.296 lb/in³
Melting Point 1336°C 2437°F
Coefficient of Expansion 13.0 μm/m °C (20 – 100°C) 7.2 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity 77.2 kN/mm² 11197 ksi
Modulus of Elasticity 204.9 kN/mm² 29719 ksi
Heat Treatment of Finished Parts
Condition as supplied by Alloy Wire Type Temperature Time (Hr) Cooling
°C °F
No. 1 or Spring Temper Anneal
Age Harden
Total Age
980
720
620
1800
1330
1150
1
8
18
Air
Furnace
Air
No. 1 or Spring Temper
(for ISO 15156-3 / NACE MR 0175)
Anneal
Age Harden
1010
790
1850
1455
2
6
Air
Air
No. 1 Temper or Spring Temper Age Harden
Total Age
720
620
1330
1150
8
18
Furnace
Air
Properties
Condition Approx. tensile strength Approx. operating temperature
N/mm² ksi °C °F
Annealed 800 – 1000 116 – 145
No 1 Temper 1000 – 1200 145 – 175
Spring Temper 1300 – 1500 189 – 218
No 1 Temper + Annealed + Aged 1250 – 1450 181 – 210 -200 to +550 -330 to +1020
No 1 Temper + Aged 1520 – 1720 220 – 250 Contact Alloy Wire Technical Dept
Spring Temper + Annealed + Aged 1250 – 1450 181 – 210 -200 to +550 -330 to +1020
Spring Temper + Aged 1700 – 1950 247 – 283 Contact Alloy Wire Technical Dept

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

* Static applications

Dynamic applications = active / lively / changing

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