A precipitation-hardenable nickel-chromium-cobalt alloy, Alloy C263 exhibits excellent high-temperature strength up to 816˚C.

With the addition of molybdenum, Alloy C263 exhibits high strength and corrosion resistance along with good formability and weldability. The alloy has good oxidation resistance up to 982˚C.

  • UNS Number: N07263
  • Werkstoff Number: 2.4650
  • AMS: 5966, 5886, 5872, 5872E
  • Other: RRMS 33031/1 (MSRR7035), BS HR10

Product availability

Round Bar
Welding Wire

Chemical analysis



  • Rings for gas turbine
  • Low-temperature combustors
  • Transition liners
  • Engine casings

About Alloy C263

Alloy C263 has high strength up to 816˚C and excellent oxidation resistance up to 982˚C. The alloy has good formability, ductility, and weldability. In the annealed condition, this alloy has excellent ductility and can easily be formed by cold working.

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 1148°C, rapid cool. After welding, the assembly may be aged 8 hours at 798°C, air cool. Repair welding of alloy C263 components may be done in the age-hardened condition.

Alloy C263 combines properties which make it suitable for a variety of fabricated components in both aircraft and land-based turbine applications. Contact usfor more information!

  • Density: 8.359 g/cm³
  • Melting range: 1300-1355°C
  • Specific Heat Capacity: 461 J/kg.°C
  • Electrical Resistivity: 1.15 µΩ.m

Mechanical & Physical Properties

Mechanical & Physical Properties21.1°C93.3°C148.9°C204.4°C315.6°C371.1°C426.7°C537.8°C595°C648.9°C705°C760°C815°C982°C
Ultimate Tensile Strength /Mpa **1004958958911880849849834-819---108
0.2% Yield Strength /Mpa **585550550520505500500500-490---70
Reduction of area %4144444750515152-50---72
Elongation %4544444445464646-43---69
Minimum Creep 0.001% per hr, MPa ---------42529016079-
1,000 hr Rupture Strength, Mpa-------69056544031018510047
Coefficient of Thermal Expansion /µm/m°C **10.311.1611.1612.0612.7812.9612.9613.68-14.22---18.1
Thermal Conductivity /kcal/(hr.m.°C) **10.0411.03611.03612.7714.2615.87215.87217.48-19.096---24.51
Modulus of Elasticity / GPa **221219219212205198198192-185---143
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