GH4220 is a Ni-Co-Cr-based precipitation-hardening deformation high-temperature alloy with a service temperature range of 900℃-950℃. The alloy incorporates significant amounts of aluminum and titanium to form γ ‘precipitation-strengthening phases, achieving over 40% w(γ’). It also utilizes cobalt, chromium, tungsten, and molybdenum for solid solution strengthening, along with trace amounts of cerium, boron, and magnesium for grain boundary strengthening. This alloy demonstrates excellent high-temperature strength and ductility, offering superior overall performance. It is suitable for manufacturing gas turbine blades operating at 900℃-950℃ temperatures. Key products include hot-rolled bars for rotating components and die-forged turbine blades.
The density of GH4220 is ρ=8.36g/cm³.
