Aluminum Titanium C263 age hardening nickel base superalloy welding wire. Gas tungsten arc welding is normally carried out using argon shielding gas. Argon + 5% hydrogen has been used. Alloy C263 base metal is normally welded in the annealed condition 2100° F, rapid cool . After welding, the assembly may be aged 8 hours at 1470° F, air cool. Repair welding of alloy C263 components may be done in the age hardened condition.

Alloy C263 (Nimonic C263) is a precipitation hardenable nickel-chromium-cobalt alloy with an addition of molybdenum for solid-solution strengthening. Alloy C263 has high strength and corrosion resistance as well as having good formability and high temperature ductility in welded structures. Alloy C263 is used in gas turbines for rings, casings and various sheet fabrications.