A large compilation of corrosion data for metals and alloys in high-temperature gases has been created. The data compilation represents about 70 commercial alloys, 4100 corrosion data measurements, and five million exposure hours. The data compilation has been developed and organized to allow prediction of sound metal thickness losses by several corrosion mechanisms at high-temperatures as fhnctions of gas composition, temperature, time, and alloy type. Several charts and tables have been prepared as examples of predicted metal losses of alloys corroding in standard conditions for several corrosion mechanisms expected in high-temperature gases. Use of the data compilation to assess corrosion will be illustrated for corrosion in oxidizing, sulfidizing, sulfidizing/ oxidizing, and carburizing conditions. Keywords: ASSET, oxidation, sulfidation, sultidation/oxidation, carburization, high-temperature corrosion rate predictions, corrosion data compilation, engineering lifetime predictions, internal corrosion, weight change, parabolic rate constant