GD 718
Equivalent materials: 2.4668 UNS N07718 ASTM B637 GD 718 is a vacuum induction melted, argon gas atomized, and spherical powder for additive manufacturing. The main strengthening mechanism of this Nickel-Chromium based superalloy occurs by precipitation of γ′-phases during the precipitation hardening. The material has exceptional mechanical properties at elevated temperature (up to 700 °C) and excellent corrosion resistance to many media. Due to its outstanding workability, it is the ffrst choice for aerospace, oil and gas industry and the chemical processing ffeld. Some typical applications are gas turbine engines, high temperature engineering, liquid fuel and exhaust systems, nuclear engineering, cryogenic engineering.
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Description
GD 718
Equivalent materials:
2.4668
UNS N07718
ASTM B637
GD 718 is a vacuum induction melted, argon gas atomized, and spherical powder for additive manufacturing. The main strengthening mechanism of this Nickel-Chromium based superalloy occurs by precipitation of γ′-phases during the precipitation hardening. The material has exceptional mechanical properties at elevated temperature (up to 700 °C) and excellent corrosion resistance to many media. Due to its outstanding workability, it is the ffrst choice for aerospace, oil and gas industry and the chemical processing ffeld. Some typical applications are gas turbine engines, high temperature engineering, liquid fuel and exhaust systems, nuclear engineering, cryogenic engineering.
Chemical composition, %
|
Element |
Cr |
Nb |
Mo |
Ti |
Al |
C |
Ni |
Fe |
|
Content, % |
19 |
5.1 |
3 |
1 |
0.5 |
0.04 |
53 |
Balance |
Typical powder properties
|
Nominal particle range |
Hall flow |
Apparent density |
|
15–45 µm |
16 s/50 g |
4.3 g/cc |
|
Other particle range |
0-25µm 45-105 µm 50-150 µm |
|
Heat treatment: Solution annealed at 1.065 °C for 1h. Precipitation hardened at 760 °C for 10 h, cooled to 650 °C in 2 h, hold at 650 °C for 8h followed by an air cooling.
2.4668
718
UNS N07718
ASTM B637
powder
additive manufacturing
AM
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