Good mechanical properties: tensile, fatigue and creep-rupture
Excellent welding characteristics, resistant to postweld age cracking
Oxidation resistant throughout its useful temperature range
Inconel Alloy 718 is a high-strength, nickel-based superalloy made for long-term use in temperatures ranging from cryogenic up to 1200°F. The alloy is readily fabricated and may be welded in either the annealed or precipitation (age) hardened condition. Anneal 1700 -1850°F; air cool or faster. Age 1325°F 8 hours; furnace cool to hold at 1150°F for a total aging time of 18 hours, air cool. Alloy 718 will show a contraction of 0.0008 inch/inch after precipitation hardening.