Alloy 263


Alloy 263 is a nickel-cobalt-chromium-molybdenum alloy designed specifically to combine very good strength properties with excellent fabrication characteristics in the annealed condition. The alloy is also age hardenable.
While its strength at elevated temperatures is not quite as high as materials such as Waspaloy or alloy R-41, it is far easier to form and weld. Alloy 263 exhibits excellent intermediate temperature tensile ductility, and is not normally subject to strain age cracking problems common for gamma prime strengthened alloys.
Typical Applications:
Gas turbine components
Heat treat equipment
High temperature / High strength applications

Mechanical Properties Test Method As Built Heat Treated
Tensile strength ISO 6892-1:2009(B) Annex D 900 ± 40 MPa 1100 ± 30 MPa
Yield Strength (Rp 0.2%) ISO 6892-1:2009(B) Annex D 650 ± 40 MPa 800 ± 30 MPa
Elongation at Break ISO 6892-1:2009(B) Annex D Approx. 40 ± 5% Approx. 35 ± 5%
Young’s modulus - 220 ± 15 GPa 220 ± 15 GPa
Chemical Composition and Physical Properties    
Chemical composition Ni
Cr
Co
Mo
Ti
Al
Mn
Fe
C
Si
P
Balance
19,2 %
19,4 %
5,8 %
2,1 %
0,4 %
≤ 0,1 %
≤ 0,06 %
≤ 0,04 %
≤ 0,02 %
≤ 0,01 %
Physical Properties Relative density Approx. 99,8 %
  Density 8,36 g/cm3
Heat Treatment Temperature Time (h)
Solution Annealing RT - 1150°C -
  1150°C 2
  1150°C - RT -
Precipitation Hardening RT - 800°C -
  800°C 8
  800°C - RT -