GH4145 is a Ni-Cr-based precipitation hardening deformed high-temperature alloy. It mainly uses the y phase as the age precipitation strengthening phase, and the service temperature is below 800°C. GH4145 has good corrosion resistance and oxidation resistance below 980℃, high strength below 800℃, good creep resistance below 700℃, and good relaxation resistance below 540℃. GH4145 also has good formability and welding performance. Its main products include plates, strips, bars, profiles, forgings, rings, wires and pipes.

GH4145 has been used to manufacture ring parts, structural parts, bolts and other parts of aero engines that operate below 800°C and require high strength and corrosion resistance, and planar waveforms that have medium or low stress and require resistance to relaxation that work below 540°C. Springs, circumferential coil springs, coil compression springs, spring retaining rings and sealing rings, etc., as well as parts used in the manufacture of gas turbine blades and other parts. GH4145 can be used for various weldings after annealing or solution treatment. The heat treatment of parts should be carried out in a sulfur-free neutral or reducing atmosphere to avoid vulcanization. Parts should avoid "hot and cold" treatment between 870°C and 650°C. For parts with large cross-sections, in order to prevent cracks, they should be cooled in the air after solution treatment.