Alloy 282


Alloy 282

Alloy 282 is a new, wrought, gamma-prime strengthened superalloy developed for high temperature structural applications, especially those in aero and industrial gas turbine engines. It possesses a unique combination of creep strength, thermal stability, weldability, and fabricability not found in currently available commercial alloys.

The new alloy has excellent creep strength in the temperature range of 1200 to 1700°F (649 to 927°C). The features of Alloy 282 make it suitable for critical gas turbine applications, such as sheet fabrications, seamless and flash butt-welded rings, and cases found in compressor, combustor, and turbine sections. In augmented aircraft gas turbines, the new alloy will be useful for exhaust and nozzle components. In industrial gas turbines, the alloy is a good candidate for transition sections and other hot-gas-path components.

Mechanical Properties Test Method As Built Heat Treated
Tensile strength ISO 6892-1:2009(B) Annex D 845 ± 27 MPa 1085 ± 5 MPa
Yield Strength (Rp 0.2%) ISO 6892-1:2009(B) Annex D 568 ± 14 MPa 718 ± 7 MPa
Elongation at Break ISO 6892-1:2009(B) Annex D Approx. 37 ± 6% Approx. 24 ± 4%
Young’s modulus - 141 ± 2 GPa 181 ± 13 GPa
Hardness DIN EN ISO 6506-1 35 ÷ 40 HRC -
Thermal Properties Test Method As Built Heat Treated
Thermal conductivity ASTM E1461-13 10.3 W/m°C -
Specific heat capacity ASTM E1461-13 436 J/kg°C -
Chemical Composition and Physical Properties    
Chemical composition Ni
Cr
Co
Mo
Ti
Al
Mn
Fe
C
Si
B
57 %
19.5 %
10 %
8.5 %
2.1 %
1.5 %
0.3 %
1.5 %
0.06 %
0.015 %
0.005 %
Physical Properties Relative density Approx. 99,99 %
  Density 8,27 g/cm3
Heat Treatment Temperature Time (h) Atmosphere
Solution Annealing RT - 1150°C 0 Argon/Vacuum
  1150°C 2 Argon/Vacuum
  1150°C - RT - Argon o Nitrogen
Precipitation Hardening RT - 800°C 0 Argon/Vacuum
  800°C 8 Argon/Vacuum
  800°C - RT - Argon o Nitrogen