Stainless steel Forging

Classification of high-temperature alloy elements

Classification of high-temperature alloy elements

According to the different matrix elements, high-temperature alloys can be divided into nickel-based, iron-based and cobalt-based high-temperature alloys.

Nickel-based high-temperature alloys: have high strength and oxidation resistance and gas corrosion resistance at high temperatures of 650-1,000℃. They are the most widely used and the highest high-temperature strength alloys among high-temperature alloys. They are widely used in the manufacture of the hottest parts of aviation jet engines and various industrial gas turbines, such as turbine blades and guide vanes.

Iron-based high-temperature alloys: have a lower operating temperature (600-850℃) and are generally used in parts of the engine with lower operating temperatures, such as turbine discs, casings and shafts.

Cobalt-based high-temperature alloys: have an operating temperature of about 950℃, good castability and weldability, and are mainly used as guide vane materials. Due to the limited cobalt resources and high prices, production and use are limited.