A large database for corrosion data and a corrosion prediction information system for metals and alloys corroding in high-temperature gases have been created. Corrosion data for about 70 commercial alloys, 4100 corrosion data measurements, and five million exposure hours have been compiled into an information system, Alloy Selection System for Elevated Temperatures (ASSET). The information system has been developed and organized to allow prediction of sound metal thickness losses for metals and alloys corroding by several common corrosion mechanisms at high-temperatures as functions of gas composition, temperature, time, and alloy. Graphs, charts and tables are presented as examples of predicted metal losses of alloys corroding in standard conditions for several corrosion mechanisms expected in high-temperature gases. Some of the uses of the data compilation and the corrosion prediction feature are illustrated for oxidizing, sulfidizing, sulfidizing/oxidizing, and carburizing conditions.