Alloy 718
Equivalent designations
UNS N07718
DIN W. Nr. 2.4668
Form
ASTM
Rod, bar and forging
B 637
Plate, sheet and strip
B 670, B 906
Seamless pipe and tube
B 983
Chemical composition
%
Ni
Fe
Cr
Mo
C
Mn
Si
P
S
Co
Nb+Ta
Ti
Al
Cu
B
min
50.0
balance
17.0
2.80
4.75
0.65
0.20
max
55.0
21.0
3.30
0.08
0.35
0.35
0.015
0.015
1.00
5.50
1.15
0.80
0.30
0.006
Physical properties
Density
8.23 g/cm3
Melting range
1260-1335℃
Features: Inconel 718 is an age-hardenable nickel-chromium alloy that combines corrosion resistance with high strength and good fabricability. It has high creep-rupture strength at temperatures up to 700℃. Its excellent relaxation resistance contributes to its application in springs.
Applications: Gas turbine engines, rocket motors, nuclear reactors and spacecraft.