Inconel 718* W.NR: 2.4668
, UNS: N07718 , *Trade name of Special Metals Group of Companies
A Nickel-Chromium alloy being precipitation
hardenable and having high creep-rupture strength at high temperatures
to about 700°C. It has higher strength than Inconel X-750 and
better mechanical properties at lower temperatures than Nimonic
90 and Inconel X-750. Applications include gas turbines, rocket
motors, space craft, nuclear reactors and pumps.
Approx
Chemical Composition (%)
Ni
Cr
Fe
Nb
Mo
Ti
Al
50-55
17-21
BAL
4.75-5.5
2.8-3.3
0.65-1.15
0.2-0.8
Density
(g/cm3)
8.19
Melting
Point (°C)
1336
Coefficient
of Expansion
13.0 µ m/m °C At
21 - 93°C
Standards
AMS 5962
ASTM B637
Heat Treatments
No. 1 Temper :
Solution anneal at
980 °C-1
Hrs-A/C
+
Age at 720 °C - 8 Hrs - F/C to 620 °C
hold at 620 °C so total age time is 18
Hrs
air cool
