alloy 718 (UNS N07718/W.Nr. 2.4668) is a
high-strength, corrosion-resistant nickel chromium
material used at -423° to 1300°F. Typical composition
limits are shown in Table 1.
The age-hardenable alloy can be readily fabricated,
even into complex parts. Its welding characteristics,
especially its resistance to postweld cracking, are
outstanding.
The ease and economy with which INCONEL alloy 718
can be fabricated, combined with good tensile, fatigue,
creep, and rupture strength, have resulted in its use in a
wide range of applications. Examples of these are
components for liquid fueled rockets, rings, casings and
various formed sheet metal parts for aircraft and land-based
gas turbine engines, and cryogenic tankage. It is also used
for fasteners and instrumentation parts.