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UNS N09907 is a nickel iron cobalt alloy with high strength and low thermal expansion coefficient, which is strengthened by aging hardening heat treatment. The combination of low expansion and high strength makes UNS N09907 alloy used for gas turbine components. Low expansion makes it easier to control clearance and tolerance, so as to improve fuel efficiency. High strength makes higher strength-density ratio can reduce the weight of aircraft engine. Therefore, UNS N09907 is used for sealing, shaft, shell and other structural components of gas turbine. The properties of the alloy are also attractive in other applications, including instruments, glass-metal seals, ceramic molds and power generation.
UNS N09907 alloy chemical composition%:
C |
Cr |
Ni |
Co |
Al |
Ti |
Fe |
≤0.06 |
≤1.0 |
35.0-40.0 |
12.0-16.0 |
≤0.2 |
1.3-1.8 |
Balance |
Nb |
B |
Si |
Mn |
S |
P |
Cu |
4.3-5.2 |
≤0.012 |
0.07-0.35 |
≤1.0 |
≤0.015 |
≤0.015 |
≤0.5 |
UNS N09907 Physical properties :
Density 8.28 g/cm3
Melting point :1332-1400 ℃