Inconel 718 is a high strength nickel base superalloy used for cryogenic temperatures up to long term service at 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.

Inventory

718 Plate, 718 Round Bar, 718 Sheet

Common Trade Names

Alloy 718, Inconel 718, Nickel 718

Specifications

AMS 5596, AMS 5662, AMS 5663, AMS 5832, ASME Case 2222-1, ASME SFA 5.14, ASTM B 637, ASTM B 670, EN 2.4668, GE B50TF14, GE B50TF15, UNS N07718, Werkstoff 2.4668

Features

Good mechanical properties: tensile, fatigue and creep-rupture

Excellent welding characteristics, resistant to postweld age cracking

Oxidation resistant throughout its useful temperature range

Applications

Gas turbine engine parts

Firearms production

Liquid fuel rocket motor components

Springs, fasteners

Cryogenic tanks

Related Literature

Data Sheet