Significant effort has been exerted to develop a cast version of the ATI 718Plus® alloy for aerospace applications with use temperatures approximately 42°C (75°F) higher than conventional alloy 718. Current alternatives to alloy 718 for low cost, hightemperature investment-cast structural components are limited. The target technology application is gas turbine structural components, including combustor plenums, stator cases, diffuser cases, turbine cases, turbine frames, and various other highstrength/high-temperature structural castings. An overview of the results from the castability and weldability studies, compositional selection and heat treatment selection, select mechanical properties, and cast component trials will be discussed. 718Plus is a registered trademark of and 718Plus® alloy is a patented proprietary alloy ATI Properties, Inc.

Recent developments from the cast 718Plus® Metals Affordability Initiative (MAI) program will be presented and discussed. The objective of the program is to investigate and enable the use of 718Plus® alloy in the form of investment castings by (1) increasing the allowable operating temperature by about 75°F as compared with conventional cast Alloy 718 and ( 2) achieve approximately 25 percent cost savings as compared with cast Waspaloy. This program builds on the successful MAI program for wrought 718Plus alloy. This technology will be implemented for the manufacture of gas turbine structural components including: combustor plenums, stator cases, diffuser cases, turbine cases, turbine frames, and other various high-strength/hightemperature structural castings. An overview of the results from the castability, weldability, and initial mechanical property investigations will be discussed. A preliminary cost benefit to aerospace components after implementation is predicted to be substantial. This recent work has warranted further investigation through the MAI program. 718Plus® is a registered trademark of ATI Properties, Inc.

Recent developments from the cast 718Plus® Metals Affordability Initiative (MAI) program will be presented and discussed. The objective of the program is to investigate and enable the use of 718Plus® alloy in the form of investment castings by (1) increasing the allowable operating temperature by about 75°F as compared with conventional cast Alloy 718 and (2) achieve approximately 25 percent cost savings as compared with cast Waspaloy. This program builds on the successful MAI program for wrought 718Plus alloy. This technology will be implemented for the manufacture of gas turbine structural components including: combustor plenums, stator cases, diffuser cases, turbine cases, turbine frames, and other various high-strength/hightemperature structural castings. An overview of the results from the castability, weldability, and initial mechanical property investigations will be discussed. A preliminary cost benefit to aerospace components after implementation is predicted to be substantial. This recent work has warranted further investigation through the MAI program.718Plus® is a registered trademark of ATI Properties, Inc.