The chemical composition of эп2220BД（GH4220）
Tech Center 2025-07-29 3
эп2220BД（GH4220） is a Ni-Co-Cr-based precipitation-hardening deformable superalloy with a service temperature range of 900 ° C to 950 ° C. When a considerable amount of aluminum and titanium elements are added to the alloy to form a γ’ precipitation strengthening phase, the w(γ ‘) can reach over 40%. At the same time, cobalt, chromium, tungsten and molybdenum elements are added for solid solution strengthening, and trace amounts of cerium, boron and magnesium elements are added for grain boundary strengthening. The alloy has high high-temperature strength and plasticity, and has good comprehensive performance. It is suitable for manufacturing gas turbine working blades with operating temperatures ranging from 900℃ to 950℃. The main products include hot-rolled bars for rotating parts and die-forged turbine blades.
The density ρ of эп2220BД（GH4220） is 8.36g/cm³.
