What is the composition of 718 grade?
Sold as both Nickel Alloy 718 and Inconel 7l8, alloy 718 is a high-strength nickel-chromium material. This age-harden alloy offers outstanding corrosion resistance and exhibits characteristics that make it easy to work with for fabrication purposes. Other key properties of Nickel Alloy 718 and Inconel 7l8 are:
Excellent relaxation resistance
Can be fabricated into even the most complex parts
Offers a wide temperature range -423°F(-253°C) to 1300°F(705°C)
Outstanding tensile, fatigue, creep, and rupture strength
Gamma Prime strengthened
Excellent oxidation resistance up to 1800°F(980°C)
Available in annealed temper, aged, cold worked, or cold worked and aged
Because of its unique array of properties, alloy 718 is popular with a number of different critical industries and applications including:
Gas turbine components
Cryogenic storage tanks
Jet engines
Liquid-fueled rocket motors and components
Fasteners and instrumentation parts
Nuclear fuel element spacers
Hot extrusion tooling
Downhole shafting and strength bolting
Chemical Composition of Nickel Alloy 718 and Inconel 718
- Al
-
-
.5 max
-
- Cb+Ta
-
-
5.13
-
- Co
-
-
1 max
-
- Fe
-
-
18.5 max
-
- Mo
-
-
3.05 max
-
- Ni
-
-
52.5 max
-
- Ti
-
-
.9 max
-
