SPS Technologies Aerex 350 is a proprietary high-strength, corrosion-resistant nickel-based superalloy that is suitable for demanding applications up to 730 °C (1350 °F). It has the highest temperature limit of the three SPS superalloys. Like MP35N and MP159, this alloy not only undergoes the multiphase reaction, but also benefits from two additional strengthening mechanisms. Elements are also added to the chemical composition to cause precipitation of the gamma prime phase with higher temperature capability than MP159. Because this alloy is used at even higher temperatures than MP159, elements are added to the chemical composition to also cause the precipitation of eta phase during thermal treatments. This phase contributes to notch toughness at elevated temperatures. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance. Filing Code: Ni-780. Producer or source: SPS Technologies, Inc.