Product features

GH907 is a Fe-Ni-Co-based precipitation-hardened low-expansion wrought superalloy, strengthened by the addition of Mo, Ti, Sace elements. The alloy possesses high strength below 650°C, a low coefficient of thermal expansion, good resistance to thermal fatigue, and an almost constant modulus of elasticy. The Curie point is between 400°C and 450°C, and the coefficient of thermal expansion remains essentially constant below this point. It is suitable for manufacturing varnnular parts and casings for aero and aerospace engines for use below 650°C; major products include bars, forgings, plates, and strips. Due to thbsence of Cr and Al elements, the alloy has poor high-temperature oxidation resistance; appropriate protective coatings should be applied for long-term use above 700°C. The alloy su can be shot-peened, which increases the rotating bending fatigue strength by approximately 18%.

Application scope domain

The alloy has been used to manufacture parts such as the rear casing of the high-pressure compressor, load-bearing rings, thermal insulation rings, combustion chamber sealing ringeycomb seats, and turbine outer rings for aero-engines, with satisfactory performance.