Alloy C263 is an age-hardenable nickel-cobalt-chromium-molybdenum alloy designed specifically to combine very good aged strength properties with excellent fabrication characteristics in the annealed condition. Its oxidation resistance is comparable to that of other gamma-prime-strengthened superalloys. The alloy has excellent forming and welding characteristics. Alloy C263 can be fabricated using both hot and cold working. Matching composition welding wire is available.

Alloy C263 welding wire is an aluminum-titanium 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.