1. Classification of 760℃ high temperature materials:

　　 (1) According to the existing theory, 760℃ high temperature materials can be divided into iron-based superalloys, nickel-based superalloys and cobalt-based superalloys according to the matrix elements.

　　 (2) According to the preparation process, it can be divided into deformed superalloys, casting superalloys and powder metallurgy superalloys.

　　(3) According to the strengthening method, there are solid solution strengthening type, precipitation strengthening type, oxide dispersion strengthening type and fiber strengthening type.

2. 1200℃ high temperature materials: 1200℃ high temperature materials are not currently used in China.

3. 1500℃ high temperature materials: 1500℃ high temperature materials are not currently used in China.