INCOLOY® alloy 907 (UNS N19907) is a nickel-iron-cobalt alloy having high strength along with a low coefficient of thermal expansion. The alloy is strengthened by age-hardening heat treatments.

The combination of low expansion and high strength makes INCOLOY alloy 907 useful for gas-turbine components. The low expansion enables closer control of clearances and tolerances for greater fuel efficiency. The high strength makes possible higher strength-to-density ratios for lower weight in aircraft engines. For those reasons, INCOLOY alloy 907 is used for gas-turbine seals, shafts, casings, and other structural parts.

The properties of INCOLOY alloy 907 are attractive for other applications including instrumentation, glass-to-metal sealing, ceramic-molding dies, and electricity generation.