Abstract: Flue gas turbines (FGTs), crucial for energy recovery in catalytic cracking, operate under extreme conditions of high temperature, corrosion, erosion, and fatigue. This review summarizes recent advances in key FGT alloy materials, focusing on alloy design, processing, and performance. Nickel-based superalloys like GH864/4738, used for turbine discs and blades, are enhanced by optimizing chemical composition, γ′ precipitates and grain‑boundary carbides for superior microstructural stability and creep resistance. Manufacturing processes leverage large‑scale die forging and thermo‑mechanical‑ microstructural simulations to produce uniform, large‑diameter nickel-based turbine discs. Cost-effective Fe-Ni-Cr-based alloys (e.g., K213) serve in stator vanes, while alloy steel (AISI 4340) shafts are toughened against hydrogen embrittlement. Additive manufacturing enables the crack-free fabrication and repair of complex blades. Significant progress in material systems and component manufacturing is evident. Future efforts require integrated material-process-property design and next-generation materials for even more demanding service environments to advance FGT efficiency and reliability.