There are numerous grades of high-temperature alloys, which can be classified into different categories based on their processing methods and strengthening mechanisms:

• Wrought High-Temperature Alloys: Common wrought high-temperature alloy grades include GH4169, GH3039, etc.

• Cast High-Temperature Alloys: Common cast high-temperature alloy grades include K409, K417, etc.

• Powder Metallurgy High-Temperature Alloys: These alloys are produced through powder metallurgy processes and exhibit excellent mechanical properties and high-temperature stability. Common powder metallurgy high-temperature alloy grades include GH5188, GH3030, etc.

• Dispersion-Strengthened High-Temperature Alloys: These alloys are strengthened by adding dispersed phases to enhance their high-temperature strength and oxidation resistance. Common dispersion-strengthened high-temperature alloy grades include GH2747, GH747, etc.

• Fe-based High-Temperature Alloys： common Fe-Based high-temperature alloys include A-286, Alloy 800H/HT, etc.

• Nickel-Based High-Temperature Alloys: Common nickel-based high-temperature alloy grades include Inconel 718, Inconel 625, etc.

• Cobalt-Based High-Temperature Alloys: Cobalt-based high-temperature alloys exhibit good strength and corrosion resistance at high temperatures. Common cobalt-based high-temperature alloy grades include Haynes 188, Stellite 6B, etc.

Additionally, there are specialized high-temperature alloys for specific applications, such as Inconel 625 and Inconel 718 for high-temperature and high-pressure environments in oil extraction, and GH3039 and GH4169 for chemical equipment. When selecting an appropriate high-temperature alloy grade, factors such as operating temperature, stress conditions, and corrosive environment must be considered.